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Finding the Fourth Proportional to 122,703.78, 169,331.01 and 68,988.90

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Solution

The fourth proportional to 122,703.78, 169,331.01 and 68,988.90 is: 95,204.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,703.78 : 169,331.01 = 68,988.90 : x
  2. Step 2: Convert to fraction form
    122,703.78/169,331.01 = 68,988.90/x
  3. Step 3: Cross multiply
    122,703.78x = 169,331.01 × 68,988.90
  4. Step 4: Simplify right side
    122,703.78x = 11,681,960,115.79
  5. Step 5: Solve for x
    x = 11,681,960,115.79/122,703.78
  6. Step 6: Final answer
    x = 95,204.57

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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.