Home / 129,432.20-178,628.49-75,713.81

Finding the Fourth Proportional to 129,432.20, 178,628.49 and 75,713.81

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Solution

The fourth proportional to 129,432.20, 178,628.49 and 75,713.81 is: 104,492.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,432.20 : 178,628.49 = 75,713.81 : x
  2. Step 2: Convert to fraction form
    129,432.20/178,628.49 = 75,713.81/x
  3. Step 3: Cross multiply
    129,432.20x = 178,628.49 × 75,713.81
  4. Step 4: Simplify right side
    129,432.20x = 13,524,642,659.30
  5. Step 5: Solve for x
    x = 13,524,642,659.30/129,432.20
  6. Step 6: Final answer
    x = 104,492.11

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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.