Home / 129,307,691.52-178,448,778-73,551,682.80

Finding the Fourth Proportional to 129,307,691.52, 178,448,778 and 73,551,682.80

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Solution

The fourth proportional to 129,307,691.52, 178,448,778 and 73,551,682.80 is: 101,503,690.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,307,691.52 : 178,448,778 = 73,551,682.80 : x
  2. Step 2: Convert to fraction form
    129,307,691.52/178,448,778 = 73,551,682.80/x
  3. Step 3: Cross multiply
    129,307,691.52x = 178,448,778 × 73,551,682.80
  4. Step 4: Simplify right side
    129,307,691.52x = 13,125,207,915,503,618
  5. Step 5: Solve for x
    x = 13,125,207,915,503,618/129,307,691.52
  6. Step 6: Final answer
    x = 101,503,690.63

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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.