Home / 129,579.29-178,758.28-75,831.03

Finding the Fourth Proportional to 129,579.29, 178,758.28 and 75,831.03

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Solution

The fourth proportional to 129,579.29, 178,758.28 and 75,831.03 is: 104,611.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,579.29 : 178,758.28 = 75,831.03 : x
  2. Step 2: Convert to fraction form
    129,579.29/178,758.28 = 75,831.03/x
  3. Step 3: Cross multiply
    129,579.29x = 178,758.28 × 75,831.03
  4. Step 4: Simplify right side
    129,579.29x = 13,555,425,129.90
  5. Step 5: Solve for x
    x = 13,555,425,129.90/129,579.29
  6. Step 6: Final answer
    x = 104,611.04

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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.