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Finding the Fourth Proportional to 68,499, 102,748.50 and 19,251

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Solution

The fourth proportional to 68,499, 102,748.50 and 19,251 is: 28,876.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,499 : 102,748.50 = 19,251 : x
  2. Step 2: Convert to fraction form
    68,499/102,748.50 = 19,251/x
  3. Step 3: Cross multiply
    68,499x = 102,748.50 × 19,251
  4. Step 4: Simplify right side
    68,499x = 1,978,011,373.50
  5. Step 5: Solve for x
    x = 1,978,011,373.50/68,499
  6. Step 6: Final answer
    x = 28,876.50

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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.