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Finding the Fourth Proportional to 122,605.42, 169,199.88 and 68,889.40

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Solution

The fourth proportional to 122,605.42, 169,199.88 and 68,889.40 is: 95,069.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,605.42 : 169,199.88 = 68,889.40 : x
  2. Step 2: Convert to fraction form
    122,605.42/169,199.88 = 68,889.40/x
  3. Step 3: Cross multiply
    122,605.42x = 169,199.88 × 68,889.40
  4. Step 4: Simplify right side
    122,605.42x = 11,656,078,213.27
  5. Step 5: Solve for x
    x = 11,656,078,213.27/122,605.42
  6. Step 6: Final answer
    x = 95,069.84

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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.