Home / 129,948.92-179,345.07-78,969.98

Finding the Fourth Proportional to 129,948.92, 179,345.07 and 78,969.98

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Solution

The fourth proportional to 129,948.92, 179,345.07 and 78,969.98 is: 108,988.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,948.92 : 179,345.07 = 78,969.98 : x
  2. Step 2: Convert to fraction form
    129,948.92/179,345.07 = 78,969.98/x
  3. Step 3: Cross multiply
    129,948.92x = 179,345.07 × 78,969.98
  4. Step 4: Simplify right side
    129,948.92x = 14,162,876,591.00
  5. Step 5: Solve for x
    x = 14,162,876,591.00/129,948.92
  6. Step 6: Final answer
    x = 108,988.03

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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.