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Finding the Fourth Proportional to 45,551.68, 68,319.84 and 12,712

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Solution

The fourth proportional to 45,551.68, 68,319.84 and 12,712 is: 19,065.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,551.68 : 68,319.84 = 12,712 : x
  2. Step 2: Convert to fraction form
    45,551.68/68,319.84 = 12,712/x
  3. Step 3: Cross multiply
    45,551.68x = 68,319.84 × 12,712
  4. Step 4: Simplify right side
    45,551.68x = 868,481,806.08
  5. Step 5: Solve for x
    x = 868,481,806.08/45,551.68
  6. Step 6: Final answer
    x = 19,065.86

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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.