Home / 129,943.86-179,269.11-87,516.06

Finding the Fourth Proportional to 129,943.86, 179,269.11 and 87,516.06

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Solution

The fourth proportional to 129,943.86, 179,269.11 and 87,516.06 is: 120,736.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,943.86 : 179,269.11 = 87,516.06 : x
  2. Step 2: Convert to fraction form
    129,943.86/179,269.11 = 87,516.06/x
  3. Step 3: Cross multiply
    129,943.86x = 179,269.11 × 87,516.06
  4. Step 4: Simplify right side
    129,943.86x = 15,688,926,186.91
  5. Step 5: Solve for x
    x = 15,688,926,186.91/129,943.86
  6. Step 6: Final answer
    x = 120,736.19

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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.