Home / 129,474.56-178,679.68-72,119.04

Finding the Fourth Proportional to 129,474.56, 178,679.68 and 72,119.04

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Solution

The fourth proportional to 129,474.56, 178,679.68 and 72,119.04 is: 99,526.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,474.56 : 178,679.68 = 72,119.04 : x
  2. Step 2: Convert to fraction form
    129,474.56/178,679.68 = 72,119.04/x
  3. Step 3: Cross multiply
    129,474.56x = 178,679.68 × 72,119.04
  4. Step 4: Simplify right side
    129,474.56x = 12,886,206,989.11
  5. Step 5: Solve for x
    x = 12,886,206,989.11/129,474.56
  6. Step 6: Final answer
    x = 99,526.94

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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.