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Finding the Fourth Proportional to 48,620.80, 72,931.20 and 45,340.30

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Solution

The fourth proportional to 48,620.80, 72,931.20 and 45,340.30 is: 68,010.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,620.80 : 72,931.20 = 45,340.30 : x
  2. Step 2: Convert to fraction form
    48,620.80/72,931.20 = 45,340.30/x
  3. Step 3: Cross multiply
    48,620.80x = 72,931.20 × 45,340.30
  4. Step 4: Simplify right side
    48,620.80x = 3,306,722,487.36
  5. Step 5: Solve for x
    x = 3,306,722,487.36/48,620.80
  6. Step 6: Final answer
    x = 68,010.45

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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.