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Finding the Fourth Proportional to 78,959.88, 108,962.10 and 43,149.78

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Solution

The fourth proportional to 78,959.88, 108,962.10 and 43,149.78 is: 59,545.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.88 : 108,962.10 = 43,149.78 : x
  2. Step 2: Convert to fraction form
    78,959.88/108,962.10 = 43,149.78/x
  3. Step 3: Cross multiply
    78,959.88x = 108,962.10 × 43,149.78
  4. Step 4: Simplify right side
    78,959.88x = 4,701,690,643.34
  5. Step 5: Solve for x
    x = 4,701,690,643.34/78,959.88
  6. Step 6: Final answer
    x = 59,545.31

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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.