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Finding the Fourth Proportional to 100,266.78, 138,364.08 and 59,956.76

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Solution

The fourth proportional to 100,266.78, 138,364.08 and 59,956.76 is: 82,737.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,266.78 : 138,364.08 = 59,956.76 : x
  2. Step 2: Convert to fraction form
    100,266.78/138,364.08 = 59,956.76/x
  3. Step 3: Cross multiply
    100,266.78x = 138,364.08 × 59,956.76
  4. Step 4: Simplify right side
    100,266.78x = 8,295,861,937.18
  5. Step 5: Solve for x
    x = 8,295,861,937.18/100,266.78
  6. Step 6: Final answer
    x = 82,737.89

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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.