Home / 129,101.44-178,156.13-71,740.58

Finding the Fourth Proportional to 129,101.44, 178,156.13 and 71,740.58

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Solution

The fourth proportional to 129,101.44, 178,156.13 and 71,740.58 is: 98,999.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,101.44 : 178,156.13 = 71,740.58 : x
  2. Step 2: Convert to fraction form
    129,101.44/178,156.13 = 71,740.58/x
  3. Step 3: Cross multiply
    129,101.44x = 178,156.13 × 71,740.58
  4. Step 4: Simplify right side
    129,101.44x = 12,781,024,721.50
  5. Step 5: Solve for x
    x = 12,781,024,721.50/129,101.44
  6. Step 6: Final answer
    x = 98,999.86

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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.