Home / 129,047.54-178,079.81-71,690.85

Finding the Fourth Proportional to 129,047.54, 178,079.81 and 71,690.85

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Solution

The fourth proportional to 129,047.54, 178,079.81 and 71,690.85 is: 98,930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,047.54 : 178,079.81 = 71,690.85 : x
  2. Step 2: Convert to fraction form
    129,047.54/178,079.81 = 71,690.85/x
  3. Step 3: Cross multiply
    129,047.54x = 178,079.81 × 71,690.85
  4. Step 4: Simplify right side
    129,047.54x = 12,766,692,588.28
  5. Step 5: Solve for x
    x = 12,766,692,588.28/129,047.54
  6. Step 6: Final answer
    x = 98,930.15

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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.