Home / 157,560.78-236,446.20-81,729.21

Finding the Fourth Proportional to 157,560.78, 236,446.20 and 81,729.21

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Solution

The fourth proportional to 157,560.78, 236,446.20 and 81,729.21 is: 122,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,560.78 : 236,446.20 = 81,729.21 : x
  2. Step 2: Convert to fraction form
    157,560.78/236,446.20 = 81,729.21/x
  3. Step 3: Cross multiply
    157,560.78x = 236,446.20 × 81,729.21
  4. Step 4: Simplify right side
    157,560.78x = 19,324,561,133.50
  5. Step 5: Solve for x
    x = 19,324,561,133.50/157,560.78
  6. Step 6: Final answer
    x = 122,648.30

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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.