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Finding the Fourth Proportional to 78,956.66, 108,961.76 and 43,148.88

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Solution

The fourth proportional to 78,956.66, 108,961.76 and 43,148.88 is: 59,546.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,956.66 : 108,961.76 = 43,148.88 : x
  2. Step 2: Convert to fraction form
    78,956.66/108,961.76 = 43,148.88/x
  3. Step 3: Cross multiply
    78,956.66x = 108,961.76 × 43,148.88
  4. Step 4: Simplify right side
    78,956.66x = 4,701,577,691.08
  5. Step 5: Solve for x
    x = 4,701,577,691.08/78,956.66
  6. Step 6: Final answer
    x = 59,546.31

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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.