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Finding the Fourth Proportional to 80,844.40, 121,237.80 and 28,255.60

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Solution

The fourth proportional to 80,844.40, 121,237.80 and 28,255.60 is: 42,373.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,844.40 : 121,237.80 = 28,255.60 : x
  2. Step 2: Convert to fraction form
    80,844.40/121,237.80 = 28,255.60/x
  3. Step 3: Cross multiply
    80,844.40x = 121,237.80 × 28,255.60
  4. Step 4: Simplify right side
    80,844.40x = 3,425,646,781.68
  5. Step 5: Solve for x
    x = 3,425,646,781.68/80,844.40
  6. Step 6: Final answer
    x = 42,373.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.