Home / 102,938.38-142,143.62-64,761.56

Finding the Fourth Proportional to 102,938.38, 142,143.62 and 64,761.56

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Solution

The fourth proportional to 102,938.38, 142,143.62 and 64,761.56 is: 89,426.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,938.38 : 142,143.62 = 64,761.56 : x
  2. Step 2: Convert to fraction form
    102,938.38/142,143.62 = 64,761.56/x
  3. Step 3: Cross multiply
    102,938.38x = 142,143.62 × 64,761.56
  4. Step 4: Simplify right side
    102,938.38x = 9,205,442,575.25
  5. Step 5: Solve for x
    x = 9,205,442,575.25/102,938.38
  6. Step 6: Final answer
    x = 89,426.73

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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.