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Finding the Fourth Proportional to 68,777.38, 103,159.15 and 18,862.49

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Solution

The fourth proportional to 68,777.38, 103,159.15 and 18,862.49 is: 28,291.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,777.38 : 103,159.15 = 18,862.49 : x
  2. Step 2: Convert to fraction form
    68,777.38/103,159.15 = 18,862.49/x
  3. Step 3: Cross multiply
    68,777.38x = 103,159.15 × 18,862.49
  4. Step 4: Simplify right side
    68,777.38x = 1,945,838,693.18
  5. Step 5: Solve for x
    x = 1,945,838,693.18/68,777.38
  6. Step 6: Final answer
    x = 28,291.84

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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.