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Finding the Fourth Proportional to 109,130.60, 163,695.90 and 39,012.20

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Solution

The fourth proportional to 109,130.60, 163,695.90 and 39,012.20 is: 58,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,130.60 : 163,695.90 = 39,012.20 : x
  2. Step 2: Convert to fraction form
    109,130.60/163,695.90 = 39,012.20/x
  3. Step 3: Cross multiply
    109,130.60x = 163,695.90 × 39,012.20
  4. Step 4: Simplify right side
    109,130.60x = 6,386,137,189.98
  5. Step 5: Solve for x
    x = 6,386,137,189.98/109,130.60
  6. Step 6: Final answer
    x = 58,518.30

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