Home / 129,150.95-178,227.05-71,788.77

Finding the Fourth Proportional to 129,150.95, 178,227.05 and 71,788.77

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Solution

The fourth proportional to 129,150.95, 178,227.05 and 71,788.77 is: 99,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,150.95 : 178,227.05 = 71,788.77 : x
  2. Step 2: Convert to fraction form
    129,150.95/178,227.05 = 71,788.77/x
  3. Step 3: Cross multiply
    129,150.95x = 178,227.05 × 71,788.77
  4. Step 4: Simplify right side
    129,150.95x = 12,794,700,341.28
  5. Step 5: Solve for x
    x = 12,794,700,341.28/129,150.95
  6. Step 6: Final answer
    x = 99,067.80

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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.