Home / 215,451.83-297,335.79-129,437.12

Finding the Fourth Proportional to 215,451.83, 297,335.79 and 129,437.12

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Solution

The fourth proportional to 215,451.83, 297,335.79 and 129,437.12 is: 178,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,451.83 : 297,335.79 = 129,437.12 : x
  2. Step 2: Convert to fraction form
    215,451.83/297,335.79 = 129,437.12/x
  3. Step 3: Cross multiply
    215,451.83x = 297,335.79 × 129,437.12
  4. Step 4: Simplify right side
    215,451.83x = 38,486,286,843.85
  5. Step 5: Solve for x
    x = 38,486,286,843.85/215,451.83
  6. Step 6: Final answer
    x = 178,630.59

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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.