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Finding the Fourth Proportional to 79,539.80, 109,763.40 and 43,729.46

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Solution

The fourth proportional to 79,539.80, 109,763.40 and 43,729.46 is: 60,345.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,539.80 : 109,763.40 = 43,729.46 : x
  2. Step 2: Convert to fraction form
    79,539.80/109,763.40 = 43,729.46/x
  3. Step 3: Cross multiply
    79,539.80x = 109,763.40 × 43,729.46
  4. Step 4: Simplify right side
    79,539.80x = 4,799,894,209.76
  5. Step 5: Solve for x
    x = 4,799,894,209.76/79,539.80
  6. Step 6: Final answer
    x = 60,345.82

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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.