Home / 215,207.20-296,864.58-129,144.16

Finding the Fourth Proportional to 215,207.20, 296,864.58 and 129,144.16

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Solution

The fourth proportional to 215,207.20, 296,864.58 and 129,144.16 is: 178,146.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,207.20 : 296,864.58 = 129,144.16 : x
  2. Step 2: Convert to fraction form
    215,207.20/296,864.58 = 129,144.16/x
  3. Step 3: Cross multiply
    215,207.20x = 296,864.58 × 129,144.16
  4. Step 4: Simplify right side
    215,207.20x = 38,338,326,817.85
  5. Step 5: Solve for x
    x = 38,338,326,817.85/215,207.20
  6. Step 6: Final answer
    x = 178,146.12

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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.