Home / 129,074.08-178,119.90-71,713.66

Finding the Fourth Proportional to 129,074.08, 178,119.90 and 71,713.66

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Solution

The fourth proportional to 129,074.08, 178,119.90 and 71,713.66 is: 98,963.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,074.08 : 178,119.90 = 71,713.66 : x
  2. Step 2: Convert to fraction form
    129,074.08/178,119.90 = 71,713.66/x
  3. Step 3: Cross multiply
    129,074.08x = 178,119.90 × 71,713.66
  4. Step 4: Simplify right side
    129,074.08x = 12,773,629,947.83
  5. Step 5: Solve for x
    x = 12,773,629,947.83/129,074.08
  6. Step 6: Final answer
    x = 98,963.56

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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.