Home / 129,242.60-178,342.50-75,540.20

Finding the Fourth Proportional to 129,242.60, 178,342.50 and 75,540.20

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Solution

The fourth proportional to 129,242.60, 178,342.50 and 75,540.20 is: 104,238.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,242.60 : 178,342.50 = 75,540.20 : x
  2. Step 2: Convert to fraction form
    129,242.60/178,342.50 = 75,540.20/x
  3. Step 3: Cross multiply
    129,242.60x = 178,342.50 × 75,540.20
  4. Step 4: Simplify right side
    129,242.60x = 13,472,028,118.50
  5. Step 5: Solve for x
    x = 13,472,028,118.50/129,242.60
  6. Step 6: Final answer
    x = 104,238.29

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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.