Home / 129,724.24-178,988.84-78,735.76

Finding the Fourth Proportional to 129,724.24, 178,988.84 and 78,735.76

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Solution

The fourth proportional to 129,724.24, 178,988.84 and 78,735.76 is: 108,636.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,724.24 : 178,988.84 = 78,735.76 : x
  2. Step 2: Convert to fraction form
    129,724.24/178,988.84 = 78,735.76/x
  3. Step 3: Cross multiply
    129,724.24x = 178,988.84 × 78,735.76
  4. Step 4: Simplify right side
    129,724.24x = 14,092,822,348.92
  5. Step 5: Solve for x
    x = 14,092,822,348.92/129,724.24
  6. Step 6: Final answer
    x = 108,636.77

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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.