Home / 215,392.76-297,275.43-129,399.61

Finding the Fourth Proportional to 215,392.76, 297,275.43 and 129,399.61

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Solution

The fourth proportional to 215,392.76, 297,275.43 and 129,399.61 is: 178,591.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,392.76 : 297,275.43 = 129,399.61 : x
  2. Step 2: Convert to fraction form
    215,392.76/297,275.43 = 129,399.61/x
  3. Step 3: Cross multiply
    215,392.76x = 297,275.43 × 129,399.61
  4. Step 4: Simplify right side
    215,392.76x = 38,467,324,704.58
  5. Step 5: Solve for x
    x = 38,467,324,704.58/215,392.76
  6. Step 6: Final answer
    x = 178,591.54

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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.