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Finding the Fourth Proportional to 80,602.20, 120,903.14 and 21,437.93

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Solution

The fourth proportional to 80,602.20, 120,903.14 and 21,437.93 is: 32,156.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,602.20 : 120,903.14 = 21,437.93 : x
  2. Step 2: Convert to fraction form
    80,602.20/120,903.14 = 21,437.93/x
  3. Step 3: Cross multiply
    80,602.20x = 120,903.14 × 21,437.93
  4. Step 4: Simplify right side
    80,602.20x = 2,591,912,696.25
  5. Step 5: Solve for x
    x = 2,591,912,696.25/80,602.20
  6. Step 6: Final answer
    x = 32,156.85

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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.