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Finding the Fourth Proportional to 50,641.90, 69,884.40 and 27,980.50

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Solution

The fourth proportional to 50,641.90, 69,884.40 and 27,980.50 is: 38,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,641.90 : 69,884.40 = 27,980.50 : x
  2. Step 2: Convert to fraction form
    50,641.90/69,884.40 = 27,980.50/x
  3. Step 3: Cross multiply
    50,641.90x = 69,884.40 × 27,980.50
  4. Step 4: Simplify right side
    50,641.90x = 1,955,400,454.20
  5. Step 5: Solve for x
    x = 1,955,400,454.20/50,641.90
  6. Step 6: Final answer
    x = 38,612.30

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.