Home / 129,422.10-178,600.80-74,981.69

Finding the Fourth Proportional to 129,422.10, 178,600.80 and 74,981.69

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Solution

The fourth proportional to 129,422.10, 178,600.80 and 74,981.69 is: 103,473.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,422.10 : 178,600.80 = 74,981.69 : x
  2. Step 2: Convert to fraction form
    129,422.10/178,600.80 = 74,981.69/x
  3. Step 3: Cross multiply
    129,422.10x = 178,600.80 × 74,981.69
  4. Step 4: Simplify right side
    129,422.10x = 13,391,789,819.35
  5. Step 5: Solve for x
    x = 13,391,789,819.35/129,422.10
  6. Step 6: Final answer
    x = 103,473.75

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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.