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Finding the Fourth Proportional to 122,438.79, 168,956.25 and 68,713.42

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Solution

The fourth proportional to 122,438.79, 168,956.25 and 68,713.42 is: 94,819.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,438.79 : 168,956.25 = 68,713.42 : x
  2. Step 2: Convert to fraction form
    122,438.79/168,956.25 = 68,713.42/x
  3. Step 3: Cross multiply
    122,438.79x = 168,956.25 × 68,713.42
  4. Step 4: Simplify right side
    122,438.79x = 11,609,561,767.88
  5. Step 5: Solve for x
    x = 11,609,561,767.88/122,438.79
  6. Step 6: Final answer
    x = 94,819.32

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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.