Home / 81,985.30-122,956.35-25,825.30

Finding the Fourth Proportional to 81,985.30, 122,956.35 and 25,825.30

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Solution

The fourth proportional to 81,985.30, 122,956.35 and 25,825.30 is: 38,731.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,985.30 : 122,956.35 = 25,825.30 : x
  2. Step 2: Convert to fraction form
    81,985.30/122,956.35 = 25,825.30/x
  3. Step 3: Cross multiply
    81,985.30x = 122,956.35 × 25,825.30
  4. Step 4: Simplify right side
    81,985.30x = 3,175,384,625.66
  5. Step 5: Solve for x
    x = 3,175,384,625.66/81,985.30
  6. Step 6: Final answer
    x = 38,731.15

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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.