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Finding the Fourth Proportional to 80,493.19, 120,712.45 and 27,890.40

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Solution

The fourth proportional to 80,493.19, 120,712.45 and 27,890.40 is: 41,826.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,493.19 : 120,712.45 = 27,890.40 : x
  2. Step 2: Convert to fraction form
    80,493.19/120,712.45 = 27,890.40/x
  3. Step 3: Cross multiply
    80,493.19x = 120,712.45 × 27,890.40
  4. Step 4: Simplify right side
    80,493.19x = 3,366,718,515.48
  5. Step 5: Solve for x
    x = 3,366,718,515.48/80,493.19
  6. Step 6: Final answer
    x = 41,826.13

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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.