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Finding the Fourth Proportional to 86,135.77, 129,229.85 and 44,045.40

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Solution

The fourth proportional to 86,135.77, 129,229.85 and 44,045.40 is: 66,081.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,135.77 : 129,229.85 = 44,045.40 : x
  2. Step 2: Convert to fraction form
    86,135.77/129,229.85 = 44,045.40/x
  3. Step 3: Cross multiply
    86,135.77x = 129,229.85 × 44,045.40
  4. Step 4: Simplify right side
    86,135.77x = 5,691,981,029.92
  5. Step 5: Solve for x
    x = 5,691,981,029.92/86,135.77
  6. Step 6: Final answer
    x = 66,081.50

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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.