Home / 129,036.18-178,084.20-75,334.38

Finding the Fourth Proportional to 129,036.18, 178,084.20 and 75,334.38

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Solution

The fourth proportional to 129,036.18, 178,084.20 and 75,334.38 is: 103,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,036.18 : 178,084.20 = 75,334.38 : x
  2. Step 2: Convert to fraction form
    129,036.18/178,084.20 = 75,334.38/x
  3. Step 3: Cross multiply
    129,036.18x = 178,084.20 × 75,334.38
  4. Step 4: Simplify right side
    129,036.18x = 13,415,862,794.80
  5. Step 5: Solve for x
    x = 13,415,862,794.80/129,036.18
  6. Step 6: Final answer
    x = 103,969.78

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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.