Home / 129,346.28-178,496.04-72,757.64

Finding the Fourth Proportional to 129,346.28, 178,496.04 and 72,757.64

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Solution

The fourth proportional to 129,346.28, 178,496.04 and 72,757.64 is: 100,404.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,346.28 : 178,496.04 = 72,757.64 : x
  2. Step 2: Convert to fraction form
    129,346.28/178,496.04 = 72,757.64/x
  3. Step 3: Cross multiply
    129,346.28x = 178,496.04 × 72,757.64
  4. Step 4: Simplify right side
    129,346.28x = 12,986,950,619.75
  5. Step 5: Solve for x
    x = 12,986,950,619.75/129,346.28
  6. Step 6: Final answer
    x = 100,404.52

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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.