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Finding the Fourth Proportional to 72,568.80, 100,149.42 and 48,328.20

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Solution

The fourth proportional to 72,568.80, 100,149.42 and 48,328.20 is: 66,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,568.80 : 100,149.42 = 48,328.20 : x
  2. Step 2: Convert to fraction form
    72,568.80/100,149.42 = 48,328.20/x
  3. Step 3: Cross multiply
    72,568.80x = 100,149.42 × 48,328.20
  4. Step 4: Simplify right side
    72,568.80x = 4,840,041,199.64
  5. Step 5: Solve for x
    x = 4,840,041,199.64/72,568.80
  6. Step 6: Final answer
    x = 66,695.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.