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Finding the Fourth Proportional to 98,687.92, 148,007.22 and 38,728.57

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Solution

The fourth proportional to 98,687.92, 148,007.22 and 38,728.57 is: 58,083.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,687.92 : 148,007.22 = 38,728.57 : x
  2. Step 2: Convert to fraction form
    98,687.92/148,007.22 = 38,728.57/x
  3. Step 3: Cross multiply
    98,687.92x = 148,007.22 × 38,728.57
  4. Step 4: Simplify right side
    98,687.92x = 5,732,107,980.28
  5. Step 5: Solve for x
    x = 5,732,107,980.28/98,687.92
  6. Step 6: Final answer
    x = 58,083.18

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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.