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Finding the Fourth Proportional to 68,425.52, 102,651.24 and 21,685.28

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Solution

The fourth proportional to 68,425.52, 102,651.24 and 21,685.28 is: 32,532.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,425.52 : 102,651.24 = 21,685.28 : x
  2. Step 2: Convert to fraction form
    68,425.52/102,651.24 = 21,685.28/x
  3. Step 3: Cross multiply
    68,425.52x = 102,651.24 × 21,685.28
  4. Step 4: Simplify right side
    68,425.52x = 2,226,020,881.75
  5. Step 5: Solve for x
    x = 2,226,020,881.75/68,425.52
  6. Step 6: Final answer
    x = 32,532.03

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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.