Home / 102,439.92-141,368.60-57,116.56

Finding the Fourth Proportional to 102,439.92, 141,368.60 and 57,116.56

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Solution

The fourth proportional to 102,439.92, 141,368.60 and 57,116.56 is: 78,821.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,439.92 : 141,368.60 = 57,116.56 : x
  2. Step 2: Convert to fraction form
    102,439.92/141,368.60 = 57,116.56/x
  3. Step 3: Cross multiply
    102,439.92x = 141,368.60 × 57,116.56
  4. Step 4: Simplify right side
    102,439.92x = 8,074,488,124.02
  5. Step 5: Solve for x
    x = 8,074,488,124.02/102,439.92
  6. Step 6: Final answer
    x = 78,821.69

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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.