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Finding the Fourth Proportional to 99,597.20, 149,392.20 and 40,431.20

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Solution

The fourth proportional to 99,597.20, 149,392.20 and 40,431.20 is: 60,645.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,597.20 : 149,392.20 = 40,431.20 : x
  2. Step 2: Convert to fraction form
    99,597.20/149,392.20 = 40,431.20/x
  3. Step 3: Cross multiply
    99,597.20x = 149,392.20 × 40,431.20
  4. Step 4: Simplify right side
    99,597.20x = 6,040,105,916.64
  5. Step 5: Solve for x
    x = 6,040,105,916.64/99,597.20
  6. Step 6: Final answer
    x = 60,645.34

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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.