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Finding the Fourth Proportional to 68,658.51, 103,002.48 and 21,272.56

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Solution

The fourth proportional to 68,658.51, 103,002.48 and 21,272.56 is: 31,913.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,658.51 : 103,002.48 = 21,272.56 : x
  2. Step 2: Convert to fraction form
    68,658.51/103,002.48 = 21,272.56/x
  3. Step 3: Cross multiply
    68,658.51x = 103,002.48 × 21,272.56
  4. Step 4: Simplify right side
    68,658.51x = 2,191,125,856.47
  5. Step 5: Solve for x
    x = 2,191,125,856.47/68,658.51
  6. Step 6: Final answer
    x = 31,913.39

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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.