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Finding the Fourth Proportional to 68,712.31, 103,002.85 and 21,934.81

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Solution

The fourth proportional to 68,712.31, 103,002.85 and 21,934.81 is: 32,881.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,712.31 : 103,002.85 = 21,934.81 : x
  2. Step 2: Convert to fraction form
    68,712.31/103,002.85 = 21,934.81/x
  3. Step 3: Cross multiply
    68,712.31x = 103,002.85 × 21,934.81
  4. Step 4: Simplify right side
    68,712.31x = 2,259,347,319.52
  5. Step 5: Solve for x
    x = 2,259,347,319.52/68,712.31
  6. Step 6: Final answer
    x = 32,881.26

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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.