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Finding the Fourth Proportional to 79,320.76, 109,481.80 and 53,869.60

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Solution

The fourth proportional to 79,320.76, 109,481.80 and 53,869.60 is: 74,353.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,320.76 : 109,481.80 = 53,869.60 : x
  2. Step 2: Convert to fraction form
    79,320.76/109,481.80 = 53,869.60/x
  3. Step 3: Cross multiply
    79,320.76x = 109,481.80 × 53,869.60
  4. Step 4: Simplify right side
    79,320.76x = 5,897,740,773.28
  5. Step 5: Solve for x
    x = 5,897,740,773.28/79,320.76
  6. Step 6: Final answer
    x = 74,353.05

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1.5x scale

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.