Home / 129,916.31-179,279.53-81,544.12

Finding the Fourth Proportional to 129,916.31, 179,279.53 and 81,544.12

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Solution

The fourth proportional to 129,916.31, 179,279.53 and 81,544.12 is: 112,527.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,916.31 : 179,279.53 = 81,544.12 : x
  2. Step 2: Convert to fraction form
    129,916.31/179,279.53 = 81,544.12/x
  3. Step 3: Cross multiply
    129,916.31x = 179,279.53 × 81,544.12
  4. Step 4: Simplify right side
    129,916.31x = 14,619,190,855.80
  5. Step 5: Solve for x
    x = 14,619,190,855.80/129,916.31
  6. Step 6: Final answer
    x = 112,527.76

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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.