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Finding the Fourth Proportional to 101,432.38, 139,974.15 and 56,112.88

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Solution

The fourth proportional to 101,432.38, 139,974.15 and 56,112.88 is: 77,434.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,432.38 : 139,974.15 = 56,112.88 : x
  2. Step 2: Convert to fraction form
    101,432.38/139,974.15 = 56,112.88/x
  3. Step 3: Cross multiply
    101,432.38x = 139,974.15 × 56,112.88
  4. Step 4: Simplify right side
    101,432.38x = 7,854,352,542.54
  5. Step 5: Solve for x
    x = 7,854,352,542.54/101,432.38
  6. Step 6: Final answer
    x = 77,434.37

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1.5x scale

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.