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Finding the Fourth Proportional to 71,188.68, 98,231.58 and 39,358.20

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Solution

The fourth proportional to 71,188.68, 98,231.58 and 39,358.20 is: 54,309.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,188.68 : 98,231.58 = 39,358.20 : x
  2. Step 2: Convert to fraction form
    71,188.68/98,231.58 = 39,358.20/x
  3. Step 3: Cross multiply
    71,188.68x = 98,231.58 × 39,358.20
  4. Step 4: Simplify right side
    71,188.68x = 3,866,218,171.96
  5. Step 5: Solve for x
    x = 3,866,218,171.96/71,188.68
  6. Step 6: Final answer
    x = 54,309.45

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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.