Home / 129,420.45-178,572.66-75,694.97

Finding the Fourth Proportional to 129,420.45, 178,572.66 and 75,694.97

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Solution

The fourth proportional to 129,420.45, 178,572.66 and 75,694.97 is: 104,442.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,420.45 : 178,572.66 = 75,694.97 : x
  2. Step 2: Convert to fraction form
    129,420.45/178,572.66 = 75,694.97/x
  3. Step 3: Cross multiply
    129,420.45x = 178,572.66 × 75,694.97
  4. Step 4: Simplify right side
    129,420.45x = 13,517,052,141.52
  5. Step 5: Solve for x
    x = 13,517,052,141.52/129,420.45
  6. Step 6: Final answer
    x = 104,442.94

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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.