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Finding the Fourth Proportional to 80,173.40, 120,250.88 and 21,013.73

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Solution

The fourth proportional to 80,173.40, 120,250.88 and 21,013.73 is: 31,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,173.40 : 120,250.88 = 21,013.73 : x
  2. Step 2: Convert to fraction form
    80,173.40/120,250.88 = 21,013.73/x
  3. Step 3: Cross multiply
    80,173.40x = 120,250.88 × 21,013.73
  4. Step 4: Simplify right side
    80,173.40x = 2,526,918,818.26
  5. Step 5: Solve for x
    x = 2,526,918,818.26/80,173.40
  6. Step 6: Final answer
    x = 31,518.17

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1.5x scale

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.