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Finding the Fourth Proportional to 45,990.52, 68,987.40 and 17,912.68

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Solution

The fourth proportional to 45,990.52, 68,987.40 and 17,912.68 is: 26,869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,990.52 : 68,987.40 = 17,912.68 : x
  2. Step 2: Convert to fraction form
    45,990.52/68,987.40 = 17,912.68/x
  3. Step 3: Cross multiply
    45,990.52x = 68,987.40 × 17,912.68
  4. Step 4: Simplify right side
    45,990.52x = 1,235,749,220.23
  5. Step 5: Solve for x
    x = 1,235,749,220.23/45,990.52
  6. Step 6: Final answer
    x = 26,869.65

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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.