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Finding the Fourth Proportional to 80,411.20, 120,616.80 and 50,862.40

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Solution

The fourth proportional to 80,411.20, 120,616.80 and 50,862.40 is: 76,293.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,411.20 : 120,616.80 = 50,862.40 : x
  2. Step 2: Convert to fraction form
    80,411.20/120,616.80 = 50,862.40/x
  3. Step 3: Cross multiply
    80,411.20x = 120,616.80 × 50,862.40
  4. Step 4: Simplify right side
    80,411.20x = 6,134,859,928.32
  5. Step 5: Solve for x
    x = 6,134,859,928.32/80,411.20
  6. Step 6: Final answer
    x = 76,293.60

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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.