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Finding the Fourth Proportional to 79,318.76, 109,479.04 and 53,867.60

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Solution

The fourth proportional to 79,318.76, 109,479.04 and 53,867.60 is: 74,350.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,318.76 : 109,479.04 = 53,867.60 : x
  2. Step 2: Convert to fraction form
    79,318.76/109,479.04 = 53,867.60/x
  3. Step 3: Cross multiply
    79,318.76x = 109,479.04 × 53,867.60
  4. Step 4: Simplify right side
    79,318.76x = 5,897,373,135.10
  5. Step 5: Solve for x
    x = 5,897,373,135.10/79,318.76
  6. Step 6: Final answer
    x = 74,350.29

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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.