Home / 129,713.39-178,977.26-78,752.95

Finding the Fourth Proportional to 129,713.39, 178,977.26 and 78,752.95

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Solution

The fourth proportional to 129,713.39, 178,977.26 and 78,752.95 is: 108,662.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,713.39 : 178,977.26 = 78,752.95 : x
  2. Step 2: Convert to fraction form
    129,713.39/178,977.26 = 78,752.95/x
  3. Step 3: Cross multiply
    129,713.39x = 178,977.26 × 78,752.95
  4. Step 4: Simplify right side
    129,713.39x = 14,094,987,207.92
  5. Step 5: Solve for x
    x = 14,094,987,207.92/129,713.39
  6. Step 6: Final answer
    x = 108,662.55

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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.