Home / 80,912.65-121,355.96-34,159.45

Finding the Fourth Proportional to 80,912.65, 121,355.96 and 34,159.45

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Solution

The fourth proportional to 80,912.65, 121,355.96 and 34,159.45 is: 51,233.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,912.65 : 121,355.96 = 34,159.45 : x
  2. Step 2: Convert to fraction form
    80,912.65/121,355.96 = 34,159.45/x
  3. Step 3: Cross multiply
    80,912.65x = 121,355.96 × 34,159.45
  4. Step 4: Simplify right side
    80,912.65x = 4,145,452,847.82
  5. Step 5: Solve for x
    x = 4,145,452,847.82/80,912.65
  6. Step 6: Final answer
    x = 51,233.68

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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.