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Finding the Fourth Proportional to 68,281.98, 102,422.97 and 21,538.50

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Solution

The fourth proportional to 68,281.98, 102,422.97 and 21,538.50 is: 32,307.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,281.98 : 102,422.97 = 21,538.50 : x
  2. Step 2: Convert to fraction form
    68,281.98/102,422.97 = 21,538.50/x
  3. Step 3: Cross multiply
    68,281.98x = 102,422.97 × 21,538.50
  4. Step 4: Simplify right side
    68,281.98x = 2,206,037,139.35
  5. Step 5: Solve for x
    x = 2,206,037,139.35/68,281.98
  6. Step 6: Final answer
    x = 32,307.75

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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.