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Finding the Fourth Proportional to 90,433.60, 135,650.40 and 80,411.20

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Solution

The fourth proportional to 90,433.60, 135,650.40 and 80,411.20 is: 120,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,433.60 : 135,650.40 = 80,411.20 : x
  2. Step 2: Convert to fraction form
    90,433.60/135,650.40 = 80,411.20/x
  3. Step 3: Cross multiply
    90,433.60x = 135,650.40 × 80,411.20
  4. Step 4: Simplify right side
    90,433.60x = 10,907,811,444.48
  5. Step 5: Solve for x
    x = 10,907,811,444.48/90,433.60
  6. Step 6: Final answer
    x = 120,616.80

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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.