Home / 129,331.62-178,486.94-71,975.72

Finding the Fourth Proportional to 129,331.62, 178,486.94 and 71,975.72

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Solution

The fourth proportional to 129,331.62, 178,486.94 and 71,975.72 is: 99,331.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,331.62 : 178,486.94 = 71,975.72 : x
  2. Step 2: Convert to fraction form
    129,331.62/178,486.94 = 71,975.72/x
  3. Step 3: Cross multiply
    129,331.62x = 178,486.94 × 71,975.72
  4. Step 4: Simplify right side
    129,331.62x = 12,846,726,643.25
  5. Step 5: Solve for x
    x = 12,846,726,643.25/129,331.62
  6. Step 6: Final answer
    x = 99,331.68

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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.