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Finding the Fourth Proportional to 68,987.64, 103,612.68 and 42,874.92

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Solution

The fourth proportional to 68,987.64, 103,612.68 and 42,874.92 is: 64,393.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,987.64 : 103,612.68 = 42,874.92 : x
  2. Step 2: Convert to fraction form
    68,987.64/103,612.68 = 42,874.92/x
  3. Step 3: Cross multiply
    68,987.64x = 103,612.68 × 42,874.92
  4. Step 4: Simplify right side
    68,987.64x = 4,442,385,365.99
  5. Step 5: Solve for x
    x = 4,442,385,365.99/68,987.64
  6. Step 6: Final answer
    x = 64,393.93

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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.