Home / 129,004.86-178,031.12-71,645.08

Finding the Fourth Proportional to 129,004.86, 178,031.12 and 71,645.08

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Solution

The fourth proportional to 129,004.86, 178,031.12 and 71,645.08 is: 98,872.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,004.86 : 178,031.12 = 71,645.08 : x
  2. Step 2: Convert to fraction form
    129,004.86/178,031.12 = 71,645.08/x
  3. Step 3: Cross multiply
    129,004.86x = 178,031.12 × 71,645.08
  4. Step 4: Simplify right side
    129,004.86x = 12,755,053,834.89
  5. Step 5: Solve for x
    x = 12,755,053,834.89/129,004.86
  6. Step 6: Final answer
    x = 98,872.66

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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.