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Finding the Fourth Proportional to 68,748, 103,128 and 19,500

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Solution

The fourth proportional to 68,748, 103,128 and 19,500 is: 29,251.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,748 : 103,128 = 19,500 : x
  2. Step 2: Convert to fraction form
    68,748/103,128 = 19,500/x
  3. Step 3: Cross multiply
    68,748x = 103,128 × 19,500
  4. Step 4: Simplify right side
    68,748x = 2,010,996,000
  5. Step 5: Solve for x
    x = 2,010,996,000/68,748
  6. Step 6: Final answer
    x = 29,251.70

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.