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Finding the Fourth Proportional to 123,382.70, 185,160.45 and 79,117.10

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Solution

The fourth proportional to 123,382.70, 185,160.45 and 79,117.10 is: 118,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,382.70 : 185,160.45 = 79,117.10 : x
  2. Step 2: Convert to fraction form
    123,382.70/185,160.45 = 79,117.10/x
  3. Step 3: Cross multiply
    123,382.70x = 185,160.45 × 79,117.10
  4. Step 4: Simplify right side
    123,382.70x = 14,649,357,838.70
  5. Step 5: Solve for x
    x = 14,649,357,838.70/123,382.70
  6. Step 6: Final answer
    x = 118,731.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.