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Finding the Fourth Proportional to 68,672.16, 103,024.30 and 21,284.77

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Solution

The fourth proportional to 68,672.16, 103,024.30 and 21,284.77 is: 31,932.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,672.16 : 103,024.30 = 21,284.77 : x
  2. Step 2: Convert to fraction form
    68,672.16/103,024.30 = 21,284.77/x
  3. Step 3: Cross multiply
    68,672.16x = 103,024.30 × 21,284.77
  4. Step 4: Simplify right side
    68,672.16x = 2,192,848,529.91
  5. Step 5: Solve for x
    x = 2,192,848,529.91/68,672.16
  6. Step 6: Final answer
    x = 31,932.13

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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.