Home / 91,069.11-136,520.96-31,872.48

Finding the Fourth Proportional to 91,069.11, 136,520.96 and 31,872.48

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Solution

The fourth proportional to 91,069.11, 136,520.96 and 31,872.48 is: 47,779.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,069.11 : 136,520.96 = 31,872.48 : x
  2. Step 2: Convert to fraction form
    91,069.11/136,520.96 = 31,872.48/x
  3. Step 3: Cross multiply
    91,069.11x = 136,520.96 × 31,872.48
  4. Step 4: Simplify right side
    91,069.11x = 4,351,262,102.29
  5. Step 5: Solve for x
    x = 4,351,262,102.29/91,069.11
  6. Step 6: Final answer
    x = 47,779.78

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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.