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Finding the Fourth Proportional to 80,411.40, 120,746.70 and 60,712.20

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Solution

The fourth proportional to 80,411.40, 120,746.70 and 60,712.20 is: 91,166.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,411.40 : 120,746.70 = 60,712.20 : x
  2. Step 2: Convert to fraction form
    80,411.40/120,746.70 = 60,712.20/x
  3. Step 3: Cross multiply
    80,411.40x = 120,746.70 × 60,712.20
  4. Step 4: Simplify right side
    80,411.40x = 7,330,797,799.74
  5. Step 5: Solve for x
    x = 7,330,797,799.74/80,411.40
  6. Step 6: Final answer
    x = 91,166.15

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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.