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Finding the Fourth Proportional to 123,113.55, 169,911.21 and 68,674.29

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Solution

The fourth proportional to 123,113.55, 169,911.21 and 68,674.29 is: 94,778.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,113.55 : 169,911.21 = 68,674.29 : x
  2. Step 2: Convert to fraction form
    123,113.55/169,911.21 = 68,674.29/x
  3. Step 3: Cross multiply
    123,113.55x = 169,911.21 × 68,674.29
  4. Step 4: Simplify right side
    123,113.55x = 11,668,532,089.43
  5. Step 5: Solve for x
    x = 11,668,532,089.43/123,113.55
  6. Step 6: Final answer
    x = 94,778.62

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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.