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Finding the Fourth Proportional to 122,700.78, 169,326.87 and 68,985.90

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Solution

The fourth proportional to 122,700.78, 169,326.87 and 68,985.90 is: 95,200.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,700.78 : 169,326.87 = 68,985.90 : x
  2. Step 2: Convert to fraction form
    122,700.78/169,326.87 = 68,985.90/x
  3. Step 3: Cross multiply
    122,700.78x = 169,326.87 × 68,985.90
  4. Step 4: Simplify right side
    122,700.78x = 11,681,166,521.13
  5. Step 5: Solve for x
    x = 11,681,166,521.13/122,700.78
  6. Step 6: Final answer
    x = 95,200.43

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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.