Home / 129,861.30-179,209.89-76,178.10

Finding the Fourth Proportional to 129,861.30, 179,209.89 and 76,178.10

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Solution

The fourth proportional to 129,861.30, 179,209.89 and 76,178.10 is: 105,126.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,861.30 : 179,209.89 = 76,178.10 : x
  2. Step 2: Convert to fraction form
    129,861.30/179,209.89 = 76,178.10/x
  3. Step 3: Cross multiply
    129,861.30x = 179,209.89 × 76,178.10
  4. Step 4: Simplify right side
    129,861.30x = 13,651,868,921.41
  5. Step 5: Solve for x
    x = 13,651,868,921.41/129,861.30
  6. Step 6: Final answer
    x = 105,126.54

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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.