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Finding the Fourth Proportional to 78,959.80, 108,963.86 and 43,149.50

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Solution

The fourth proportional to 78,959.80, 108,963.86 and 43,149.50 is: 59,545.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.80 : 108,963.86 = 43,149.50 : x
  2. Step 2: Convert to fraction form
    78,959.80/108,963.86 = 43,149.50/x
  3. Step 3: Cross multiply
    78,959.80x = 108,963.86 × 43,149.50
  4. Step 4: Simplify right side
    78,959.80x = 4,701,736,077.07
  5. Step 5: Solve for x
    x = 4,701,736,077.07/78,959.80
  6. Step 6: Final answer
    x = 59,545.95

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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.