Home / 129,500.18-178,718.48-78,517.79

Finding the Fourth Proportional to 129,500.18, 178,718.48 and 78,517.79

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Solution

The fourth proportional to 129,500.18, 178,718.48 and 78,517.79 is: 108,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,500.18 : 178,718.48 = 78,517.79 : x
  2. Step 2: Convert to fraction form
    129,500.18/178,718.48 = 78,517.79/x
  3. Step 3: Cross multiply
    129,500.18x = 178,718.48 × 78,517.79
  4. Step 4: Simplify right side
    129,500.18x = 14,032,580,081.76
  5. Step 5: Solve for x
    x = 14,032,580,081.76/129,500.18
  6. Step 6: Final answer
    x = 108,359.54

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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.