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Finding the Fourth Proportional to 123,160.70, 169,963.65 and 72,161.22

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Solution

The fourth proportional to 123,160.70, 169,963.65 and 72,161.22 is: 99,583.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,160.70 : 169,963.65 = 72,161.22 : x
  2. Step 2: Convert to fraction form
    123,160.70/169,963.65 = 72,161.22/x
  3. Step 3: Cross multiply
    123,160.70x = 169,963.65 × 72,161.22
  4. Step 4: Simplify right side
    123,160.70x = 12,264,784,339.65
  5. Step 5: Solve for x
    x = 12,264,784,339.65/123,160.70
  6. Step 6: Final answer
    x = 99,583.59

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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.