Home / 129,435.95-178,553.10-89,079.65

Finding the Fourth Proportional to 129,435.95, 178,553.10 and 89,079.65

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Solution

The fourth proportional to 129,435.95, 178,553.10 and 89,079.65 is: 122,882.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,435.95 : 178,553.10 = 89,079.65 : x
  2. Step 2: Convert to fraction form
    129,435.95/178,553.10 = 89,079.65/x
  3. Step 3: Cross multiply
    129,435.95x = 178,553.10 × 89,079.65
  4. Step 4: Simplify right side
    129,435.95x = 15,905,447,654.42
  5. Step 5: Solve for x
    x = 15,905,447,654.42/129,435.95
  6. Step 6: Final answer
    x = 122,882.77

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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.