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Finding the Fourth Proportional to 45,620.80, 68,431.20 and 40,436.80

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Solution

The fourth proportional to 45,620.80, 68,431.20 and 40,436.80 is: 60,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,620.80 : 68,431.20 = 40,436.80 : x
  2. Step 2: Convert to fraction form
    45,620.80/68,431.20 = 40,436.80/x
  3. Step 3: Cross multiply
    45,620.80x = 68,431.20 × 40,436.80
  4. Step 4: Simplify right side
    45,620.80x = 2,767,138,748.16
  5. Step 5: Solve for x
    x = 2,767,138,748.16/45,620.80
  6. Step 6: Final answer
    x = 60,655.20

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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.