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Finding the Fourth Proportional to 68,671.91, 103,023.93 and 21,284.52

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Solution

The fourth proportional to 68,671.91, 103,023.93 and 21,284.52 is: 31,931.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,671.91 : 103,023.93 = 21,284.52 : x
  2. Step 2: Convert to fraction form
    68,671.91/103,023.93 = 21,284.52/x
  3. Step 3: Cross multiply
    68,671.91x = 103,023.93 × 21,284.52
  4. Step 4: Simplify right side
    68,671.91x = 2,192,814,898.56
  5. Step 5: Solve for x
    x = 2,192,814,898.56/68,671.91
  6. Step 6: Final answer
    x = 31,931.76

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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.