Home / 129,585.42-178,759.71-89,229.20

Finding the Fourth Proportional to 129,585.42, 178,759.71 and 89,229.20

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Solution

The fourth proportional to 129,585.42, 178,759.71 and 89,229.20 is: 123,089.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,585.42 : 178,759.71 = 89,229.20 : x
  2. Step 2: Convert to fraction form
    129,585.42/178,759.71 = 89,229.20/x
  3. Step 3: Cross multiply
    129,585.42x = 178,759.71 × 89,229.20
  4. Step 4: Simplify right side
    129,585.42x = 15,950,585,021.73
  5. Step 5: Solve for x
    x = 15,950,585,021.73/129,585.42
  6. Step 6: Final answer
    x = 123,089.35

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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.