Home / 81,131.18-121,638.45-36,735.08

Finding the Fourth Proportional to 81,131.18, 121,638.45 and 36,735.08

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Solution

The fourth proportional to 81,131.18, 121,638.45 and 36,735.08 is: 55,076.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,131.18 : 121,638.45 = 36,735.08 : x
  2. Step 2: Convert to fraction form
    81,131.18/121,638.45 = 36,735.08/x
  3. Step 3: Cross multiply
    81,131.18x = 121,638.45 × 36,735.08
  4. Step 4: Simplify right side
    81,131.18x = 4,468,398,191.83
  5. Step 5: Solve for x
    x = 4,468,398,191.83/81,131.18
  6. Step 6: Final answer
    x = 55,076.21

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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.