Home / 129,101.94-178,156.82-71,741.09

Finding the Fourth Proportional to 129,101.94, 178,156.82 and 71,741.09

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Solution

The fourth proportional to 129,101.94, 178,156.82 and 71,741.09 is: 99,000.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,101.94 : 178,156.82 = 71,741.09 : x
  2. Step 2: Convert to fraction form
    129,101.94/178,156.82 = 71,741.09/x
  3. Step 3: Cross multiply
    129,101.94x = 178,156.82 × 71,741.09
  4. Step 4: Simplify right side
    129,101.94x = 12,781,163,566.95
  5. Step 5: Solve for x
    x = 12,781,163,566.95/129,101.94
  6. Step 6: Final answer
    x = 99,000.55

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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.