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Finding the Fourth Proportional to 99,424.40, 149,021.40 and 40,230.80

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Solution

The fourth proportional to 99,424.40, 149,021.40 and 40,230.80 is: 60,299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,424.40 : 149,021.40 = 40,230.80 : x
  2. Step 2: Convert to fraction form
    99,424.40/149,021.40 = 40,230.80/x
  3. Step 3: Cross multiply
    99,424.40x = 149,021.40 × 40,230.80
  4. Step 4: Simplify right side
    99,424.40x = 5,995,250,139.12
  5. Step 5: Solve for x
    x = 5,995,250,139.12/99,424.40
  6. Step 6: Final answer
    x = 60,299.59

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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.