Home / 81,688.42-122,475.03-31,726.90

Finding the Fourth Proportional to 81,688.42, 122,475.03 and 31,726.90

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Solution

The fourth proportional to 81,688.42, 122,475.03 and 31,726.90 is: 47,567.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,688.42 : 122,475.03 = 31,726.90 : x
  2. Step 2: Convert to fraction form
    81,688.42/122,475.03 = 31,726.90/x
  3. Step 3: Cross multiply
    81,688.42x = 122,475.03 × 31,726.90
  4. Step 4: Simplify right side
    81,688.42x = 3,885,753,029.31
  5. Step 5: Solve for x
    x = 3,885,753,029.31/81,688.42
  6. Step 6: Final answer
    x = 47,567.98

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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.