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Finding the Fourth Proportional to 99,438.40, 149,042.40 and 40,244.80

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Solution

The fourth proportional to 99,438.40, 149,042.40 and 40,244.80 is: 60,320.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,438.40 : 149,042.40 = 40,244.80 : x
  2. Step 2: Convert to fraction form
    99,438.40/149,042.40 = 40,244.80/x
  3. Step 3: Cross multiply
    99,438.40x = 149,042.40 × 40,244.80
  4. Step 4: Simplify right side
    99,438.40x = 5,998,181,579.52
  5. Step 5: Solve for x
    x = 5,998,181,579.52/99,438.40
  6. Step 6: Final answer
    x = 60,320.58

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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.