Home / 129,432.60-178,567.36-80,351.20

Finding the Fourth Proportional to 129,432.60, 178,567.36 and 80,351.20

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Solution

The fourth proportional to 129,432.60, 178,567.36 and 80,351.20 is: 110,853.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,432.60 : 178,567.36 = 80,351.20 : x
  2. Step 2: Convert to fraction form
    129,432.60/178,567.36 = 80,351.20/x
  3. Step 3: Cross multiply
    129,432.60x = 178,567.36 × 80,351.20
  4. Step 4: Simplify right side
    129,432.60x = 14,348,101,656.83
  5. Step 5: Solve for x
    x = 14,348,101,656.83/129,432.60
  6. Step 6: Final answer
    x = 110,853.85

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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.