Home / 165,731.15-248,432.70-81,422.30

Finding the Fourth Proportional to 165,731.15, 248,432.70 and 81,422.30

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Solution

The fourth proportional to 165,731.15, 248,432.70 and 81,422.30 is: 122,052.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,731.15 : 248,432.70 = 81,422.30 : x
  2. Step 2: Convert to fraction form
    165,731.15/248,432.70 = 81,422.30/x
  3. Step 3: Cross multiply
    165,731.15x = 248,432.70 × 81,422.30
  4. Step 4: Simplify right side
    165,731.15x = 20,227,961,829.21
  5. Step 5: Solve for x
    x = 20,227,961,829.21/165,731.15
  6. Step 6: Final answer
    x = 122,052.87

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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.