Home / 129,074.00-178,115.90-71,716.95

Finding the Fourth Proportional to 129,074.00, 178,115.90 and 71,716.95

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Solution

The fourth proportional to 129,074.00, 178,115.90 and 71,716.95 is: 98,965.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,074.00 : 178,115.90 = 71,716.95 : x
  2. Step 2: Convert to fraction form
    129,074.00/178,115.90 = 71,716.95/x
  3. Step 3: Cross multiply
    129,074.00x = 178,115.90 × 71,716.95
  4. Step 4: Simplify right side
    129,074.00x = 12,773,928,735.92
  5. Step 5: Solve for x
    x = 12,773,928,735.92/129,074.00
  6. Step 6: Final answer
    x = 98,965.94

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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.