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Finding the Fourth Proportional to 68,728.40, 103,032.60 and 26,637.20

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Solution

The fourth proportional to 68,728.40, 103,032.60 and 26,637.20 is: 39,932.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,728.40 : 103,032.60 = 26,637.20 : x
  2. Step 2: Convert to fraction form
    68,728.40/103,032.60 = 26,637.20/x
  3. Step 3: Cross multiply
    68,728.40x = 103,032.60 × 26,637.20
  4. Step 4: Simplify right side
    68,728.40x = 2,744,499,972.72
  5. Step 5: Solve for x
    x = 2,744,499,972.72/68,728.40
  6. Step 6: Final answer
    x = 39,932.55

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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.