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Finding the Fourth Proportional to 72,487.55, 108,762.62 and 39,231.08

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Solution

The fourth proportional to 72,487.55, 108,762.62 and 39,231.08 is: 58,863.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,487.55 : 108,762.62 = 39,231.08 : x
  2. Step 2: Convert to fraction form
    72,487.55/108,762.62 = 39,231.08/x
  3. Step 3: Cross multiply
    72,487.55x = 108,762.62 × 39,231.08
  4. Step 4: Simplify right side
    72,487.55x = 4,266,874,306.26
  5. Step 5: Solve for x
    x = 4,266,874,306.26/72,487.55
  6. Step 6: Final answer
    x = 58,863.55

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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.