Home / 99,717.20-149,575.80-71,723.60

Finding the Fourth Proportional to 99,717.20, 149,575.80 and 71,723.60

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Solution

The fourth proportional to 99,717.20, 149,575.80 and 71,723.60 is: 107,585.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,717.20 : 149,575.80 = 71,723.60 : x
  2. Step 2: Convert to fraction form
    99,717.20/149,575.80 = 71,723.60/x
  3. Step 3: Cross multiply
    99,717.20x = 149,575.80 × 71,723.60
  4. Step 4: Simplify right side
    99,717.20x = 10,728,114,848.88
  5. Step 5: Solve for x
    x = 10,728,114,848.88/99,717.20
  6. Step 6: Final answer
    x = 107,585.40

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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.