Home / 100,644.48-138,761.28-62,904.96

Finding the Fourth Proportional to 100,644.48, 138,761.28 and 62,904.96

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Solution

The fourth proportional to 100,644.48, 138,761.28 and 62,904.96 is: 86,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,644.48 : 138,761.28 = 62,904.96 : x
  2. Step 2: Convert to fraction form
    100,644.48/138,761.28 = 62,904.96/x
  3. Step 3: Cross multiply
    100,644.48x = 138,761.28 × 62,904.96
  4. Step 4: Simplify right side
    100,644.48x = 8,728,772,767.95
  5. Step 5: Solve for x
    x = 8,728,772,767.95/100,644.48
  6. Step 6: Final answer
    x = 86,728.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.