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Finding the Fourth Proportional to 45,805.76, 68,700.42 and 20,846.61

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Solution

The fourth proportional to 45,805.76, 68,700.42 and 20,846.61 is: 31,266.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,805.76 : 68,700.42 = 20,846.61 : x
  2. Step 2: Convert to fraction form
    45,805.76/68,700.42 = 20,846.61/x
  3. Step 3: Cross multiply
    45,805.76x = 68,700.42 × 20,846.61
  4. Step 4: Simplify right side
    45,805.76x = 1,432,170,862.58
  5. Step 5: Solve for x
    x = 1,432,170,862.58/45,805.76
  6. Step 6: Final answer
    x = 31,266.18

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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.