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Finding the Fourth Proportional to 90,463.65, 124,836.87 and 54,647.43

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Solution

The fourth proportional to 90,463.65, 124,836.87 and 54,647.43 is: 75,411.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,463.65 : 124,836.87 = 54,647.43 : x
  2. Step 2: Convert to fraction form
    90,463.65/124,836.87 = 54,647.43/x
  3. Step 3: Cross multiply
    90,463.65x = 124,836.87 × 54,647.43
  4. Step 4: Simplify right side
    90,463.65x = 6,822,013,851.53
  5. Step 5: Solve for x
    x = 6,822,013,851.53/90,463.65
  6. Step 6: Final answer
    x = 75,411.66

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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.