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Finding the Fourth Proportional to 72,572.67, 108,890.19 and 39,316.50

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Solution

The fourth proportional to 72,572.67, 108,890.19 and 39,316.50 is: 58,991.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,572.67 : 108,890.19 = 39,316.50 : x
  2. Step 2: Convert to fraction form
    72,572.67/108,890.19 = 39,316.50/x
  3. Step 3: Cross multiply
    72,572.67x = 108,890.19 × 39,316.50
  4. Step 4: Simplify right side
    72,572.67x = 4,281,181,155.14
  5. Step 5: Solve for x
    x = 4,281,181,155.14/72,572.67
  6. Step 6: Final answer
    x = 58,991.64

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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.