Home / 81,306.27-121,889.31-31,421.37

Finding the Fourth Proportional to 81,306.27, 121,889.31 and 31,421.37

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Solution

The fourth proportional to 81,306.27, 121,889.31 and 31,421.37 is: 47,104.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,306.27 : 121,889.31 = 31,421.37 : x
  2. Step 2: Convert to fraction form
    81,306.27/121,889.31 = 31,421.37/x
  3. Step 3: Cross multiply
    81,306.27x = 121,889.31 × 31,421.37
  4. Step 4: Simplify right side
    81,306.27x = 3,829,929,108.55
  5. Step 5: Solve for x
    x = 3,829,929,108.55/81,306.27
  6. Step 6: Final answer
    x = 47,104.97

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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.