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Finding the Fourth Proportional to 85,993.32, 129,039.80 and 36,068.97

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Solution

The fourth proportional to 85,993.32, 129,039.80 and 36,068.97 is: 54,124.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,993.32 : 129,039.80 = 36,068.97 : x
  2. Step 2: Convert to fraction form
    85,993.32/129,039.80 = 36,068.97/x
  3. Step 3: Cross multiply
    85,993.32x = 129,039.80 × 36,068.97
  4. Step 4: Simplify right side
    85,993.32x = 4,654,332,494.66
  5. Step 5: Solve for x
    x = 4,654,332,494.66/85,993.32
  6. Step 6: Final answer
    x = 54,124.35

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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.