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Finding the Fourth Proportional to 86,656.10, 129,984.15 and 49,331.30

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Solution

The fourth proportional to 86,656.10, 129,984.15 and 49,331.30 is: 73,996.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,656.10 : 129,984.15 = 49,331.30 : x
  2. Step 2: Convert to fraction form
    86,656.10/129,984.15 = 49,331.30/x
  3. Step 3: Cross multiply
    86,656.10x = 129,984.15 × 49,331.30
  4. Step 4: Simplify right side
    86,656.10x = 6,412,287,098.90
  5. Step 5: Solve for x
    x = 6,412,287,098.90/86,656.10
  6. Step 6: Final answer
    x = 73,996.95

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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.