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Finding the Fourth Proportional to 99,652.80, 149,479.20 and 82,372.80

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Solution

The fourth proportional to 99,652.80, 149,479.20 and 82,372.80 is: 123,559.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,652.80 : 149,479.20 = 82,372.80 : x
  2. Step 2: Convert to fraction form
    99,652.80/149,479.20 = 82,372.80/x
  3. Step 3: Cross multiply
    99,652.80x = 149,479.20 × 82,372.80
  4. Step 4: Simplify right side
    99,652.80x = 12,313,020,245.76
  5. Step 5: Solve for x
    x = 12,313,020,245.76/99,652.80
  6. Step 6: Final answer
    x = 123,559.20

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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.