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Finding the Fourth Proportional to 68,728.32, 103,132.08 and 37,138.44

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Solution

The fourth proportional to 68,728.32, 103,132.08 and 37,138.44 is: 55,729.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,728.32 : 103,132.08 = 37,138.44 : x
  2. Step 2: Convert to fraction form
    68,728.32/103,132.08 = 37,138.44/x
  3. Step 3: Cross multiply
    68,728.32x = 103,132.08 × 37,138.44
  4. Step 4: Simplify right side
    68,728.32x = 3,830,164,565.16
  5. Step 5: Solve for x
    x = 3,830,164,565.16/68,728.32
  6. Step 6: Final answer
    x = 55,729.06

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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.