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Finding the Fourth Proportional to 78,959.13, 108,965.03 and 43,150.65

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Solution

The fourth proportional to 78,959.13, 108,965.03 and 43,150.65 is: 59,548.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.13 : 108,965.03 = 43,150.65 : x
  2. Step 2: Convert to fraction form
    78,959.13/108,965.03 = 43,150.65/x
  3. Step 3: Cross multiply
    78,959.13x = 108,965.03 × 43,150.65
  4. Step 4: Simplify right side
    78,959.13x = 4,701,911,656.02
  5. Step 5: Solve for x
    x = 4,701,911,656.02/78,959.13
  6. Step 6: Final answer
    x = 59,548.68

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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.