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Finding the Fourth Proportional to 68,777.29, 103,159.02 and 18,862.40

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Solution

The fourth proportional to 68,777.29, 103,159.02 and 18,862.40 is: 28,291.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,777.29 : 103,159.02 = 18,862.40 : x
  2. Step 2: Convert to fraction form
    68,777.29/103,159.02 = 18,862.40/x
  3. Step 3: Cross multiply
    68,777.29x = 103,159.02 × 18,862.40
  4. Step 4: Simplify right side
    68,777.29x = 1,945,827,027.48
  5. Step 5: Solve for x
    x = 1,945,827,027.48/68,777.29
  6. Step 6: Final answer
    x = 28,291.71

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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.