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Finding the Fourth Proportional to 78,956.30, 108,959.47 and 43,146.54

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Solution

The fourth proportional to 78,956.30, 108,959.47 and 43,146.54 is: 59,542.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,956.30 : 108,959.47 = 43,146.54 : x
  2. Step 2: Convert to fraction form
    78,956.30/108,959.47 = 43,146.54/x
  3. Step 3: Cross multiply
    78,956.30x = 108,959.47 × 43,146.54
  4. Step 4: Simplify right side
    78,956.30x = 4,701,223,912.27
  5. Step 5: Solve for x
    x = 4,701,223,912.27/78,956.30
  6. Step 6: Final answer
    x = 59,542.10

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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.