Home / 129,379.14-178,543.17-72,017.21

Finding the Fourth Proportional to 129,379.14, 178,543.17 and 72,017.21

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Solution

The fourth proportional to 129,379.14, 178,543.17 and 72,017.21 is: 99,383.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,379.14 : 178,543.17 = 72,017.21 : x
  2. Step 2: Convert to fraction form
    129,379.14/178,543.17 = 72,017.21/x
  3. Step 3: Cross multiply
    129,379.14x = 178,543.17 × 72,017.21
  4. Step 4: Simplify right side
    129,379.14x = 12,858,181,414.31
  5. Step 5: Solve for x
    x = 12,858,181,414.31/129,379.14
  6. Step 6: Final answer
    x = 99,383.73

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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.