Home / 129,543.15-178,732.40-89,267.79

Finding the Fourth Proportional to 129,543.15, 178,732.40 and 89,267.79

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Solution

The fourth proportional to 129,543.15, 178,732.40 and 89,267.79 is: 123,163.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,543.15 : 178,732.40 = 89,267.79 : x
  2. Step 2: Convert to fraction form
    129,543.15/178,732.40 = 89,267.79/x
  3. Step 3: Cross multiply
    129,543.15x = 178,732.40 × 89,267.79
  4. Step 4: Simplify right side
    129,543.15x = 15,955,045,903.06
  5. Step 5: Solve for x
    x = 15,955,045,903.06/129,543.15
  6. Step 6: Final answer
    x = 123,163.95

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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.