Home / 129,135.96-178,199.46-75,436.20

Finding the Fourth Proportional to 129,135.96, 178,199.46 and 75,436.20

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Solution

The fourth proportional to 129,135.96, 178,199.46 and 75,436.20 is: 104,097.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,135.96 : 178,199.46 = 75,436.20 : x
  2. Step 2: Convert to fraction form
    129,135.96/178,199.46 = 75,436.20/x
  3. Step 3: Cross multiply
    129,135.96x = 178,199.46 × 75,436.20
  4. Step 4: Simplify right side
    129,135.96x = 13,442,690,104.45
  5. Step 5: Solve for x
    x = 13,442,690,104.45/129,135.96
  6. Step 6: Final answer
    x = 104,097.19

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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.