Home / 129,125.95-178,198.38-71,766.41

Finding the Fourth Proportional to 129,125.95, 178,198.38 and 71,766.41

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Solution

The fourth proportional to 129,125.95, 178,198.38 and 71,766.41 is: 99,040.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,125.95 : 178,198.38 = 71,766.41 : x
  2. Step 2: Convert to fraction form
    129,125.95/178,198.38 = 71,766.41/x
  3. Step 3: Cross multiply
    129,125.95x = 178,198.38 × 71,766.41
  4. Step 4: Simplify right side
    129,125.95x = 12,788,657,109.42
  5. Step 5: Solve for x
    x = 12,788,657,109.42/129,125.95
  6. Step 6: Final answer
    x = 99,040.18

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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.