Home / 72,451.92-108,678.60-19,861.38

Finding the Fourth Proportional to 72,451.92, 108,678.60 and 19,861.38

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Solution

The fourth proportional to 72,451.92, 108,678.60 and 19,861.38 is: 29,792.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,451.92 : 108,678.60 = 19,861.38 : x
  2. Step 2: Convert to fraction form
    72,451.92/108,678.60 = 19,861.38/x
  3. Step 3: Cross multiply
    72,451.92x = 108,678.60 × 19,861.38
  4. Step 4: Simplify right side
    72,451.92x = 2,158,506,972.47
  5. Step 5: Solve for x
    x = 2,158,506,972.47/72,451.92
  6. Step 6: Final answer
    x = 29,792.27

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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.