Home / 129,701.06-178,957.00-78,712.66

Finding the Fourth Proportional to 129,701.06, 178,957.00 and 78,712.66

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Solution

The fourth proportional to 129,701.06, 178,957.00 and 78,712.66 is: 108,604.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,701.06 : 178,957.00 = 78,712.66 : x
  2. Step 2: Convert to fraction form
    129,701.06/178,957.00 = 78,712.66/x
  3. Step 3: Cross multiply
    129,701.06x = 178,957.00 × 78,712.66
  4. Step 4: Simplify right side
    129,701.06x = 14,086,181,374.95
  5. Step 5: Solve for x
    x = 14,086,181,374.95/129,701.06
  6. Step 6: Final answer
    x = 108,604.98

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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.