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Finding the Fourth Proportional to 68,657.32, 103,002.42 and 28,654.06

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Solution

The fourth proportional to 68,657.32, 103,002.42 and 28,654.06 is: 42,987.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,657.32 : 103,002.42 = 28,654.06 : x
  2. Step 2: Convert to fraction form
    68,657.32/103,002.42 = 28,654.06/x
  3. Step 3: Cross multiply
    68,657.32x = 103,002.42 × 28,654.06
  4. Step 4: Simplify right side
    68,657.32x = 2,951,437,522.83
  5. Step 5: Solve for x
    x = 2,951,437,522.83/68,657.32
  6. Step 6: Final answer
    x = 42,987.95

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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.