Home / 129,248.52-178,378.97-72,659.89

Finding the Fourth Proportional to 129,248.52, 178,378.97 and 72,659.89

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Solution

The fourth proportional to 129,248.52, 178,378.97 and 72,659.89 is: 100,279.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,248.52 : 178,378.97 = 72,659.89 : x
  2. Step 2: Convert to fraction form
    129,248.52/178,378.97 = 72,659.89/x
  3. Step 3: Cross multiply
    129,248.52x = 178,378.97 × 72,659.89
  4. Step 4: Simplify right side
    129,248.52x = 12,960,996,338.51
  5. Step 5: Solve for x
    x = 12,960,996,338.51/129,248.52
  6. Step 6: Final answer
    x = 100,279.65

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1.5x scale

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.