Home / 129,549.11-178,778.14-75,111.84

Finding the Fourth Proportional to 129,549.11, 178,778.14 and 75,111.84

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Solution

The fourth proportional to 129,549.11, 178,778.14 and 75,111.84 is: 103,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,549.11 : 178,778.14 = 75,111.84 : x
  2. Step 2: Convert to fraction form
    129,549.11/178,778.14 = 75,111.84/x
  3. Step 3: Cross multiply
    129,549.11x = 178,778.14 × 75,111.84
  4. Step 4: Simplify right side
    129,549.11x = 13,428,354,859.40
  5. Step 5: Solve for x
    x = 13,428,354,859.40/129,549.11
  6. Step 6: Final answer
    x = 103,654.56

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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.