Home / 78,909.11-108,894.56-43,099.20

Finding the Fourth Proportional to 78,909.11, 108,894.56 and 43,099.20

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Solution

The fourth proportional to 78,909.11, 108,894.56 and 43,099.20 is: 59,476.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.11 : 108,894.56 = 43,099.20 : x
  2. Step 2: Convert to fraction form
    78,909.11/108,894.56 = 43,099.20/x
  3. Step 3: Cross multiply
    78,909.11x = 108,894.56 × 43,099.20
  4. Step 4: Simplify right side
    78,909.11x = 4,693,268,141.02
  5. Step 5: Solve for x
    x = 4,693,268,141.02/78,909.11
  6. Step 6: Final answer
    x = 59,476.89

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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.