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Finding the Fourth Proportional to 61,420.10, 92,130.15 and 21,980.30

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Solution

The fourth proportional to 61,420.10, 92,130.15 and 21,980.30 is: 32,970.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,420.10 : 92,130.15 = 21,980.30 : x
  2. Step 2: Convert to fraction form
    61,420.10/92,130.15 = 21,980.30/x
  3. Step 3: Cross multiply
    61,420.10x = 92,130.15 × 21,980.30
  4. Step 4: Simplify right side
    61,420.10x = 2,025,048,336.05
  5. Step 5: Solve for x
    x = 2,025,048,336.05/61,420.10
  6. Step 6: Final answer
    x = 32,970.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.