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Finding the Fourth Proportional to 80,301.87, 120,447.95 and 21,136.23

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Solution

The fourth proportional to 80,301.87, 120,447.95 and 21,136.23 is: 31,703.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,301.87 : 120,447.95 = 21,136.23 : x
  2. Step 2: Convert to fraction form
    80,301.87/120,447.95 = 21,136.23/x
  3. Step 3: Cross multiply
    80,301.87x = 120,447.95 × 21,136.23
  4. Step 4: Simplify right side
    80,301.87x = 2,545,815,468.55
  5. Step 5: Solve for x
    x = 2,545,815,468.55/80,301.87
  6. Step 6: Final answer
    x = 31,703.07

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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.