Home / 86,223.12-129,225-38,787.48

Finding the Fourth Proportional to 86,223.12, 129,225 and 38,787.48

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Solution

The fourth proportional to 86,223.12, 129,225 and 38,787.48 is: 58,131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,223.12 : 129,225 = 38,787.48 : x
  2. Step 2: Convert to fraction form
    86,223.12/129,225 = 38,787.48/x
  3. Step 3: Cross multiply
    86,223.12x = 129,225 × 38,787.48
  4. Step 4: Simplify right side
    86,223.12x = 5,012,312,103
  5. Step 5: Solve for x
    x = 5,012,312,103/86,223.12
  6. Step 6: Final answer
    x = 58,131.88

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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.