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Finding the Fourth Proportional to 68,899.96, 103,169.51 and 45,132.74

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Solution

The fourth proportional to 68,899.96, 103,169.51 and 45,132.74 is: 67,580.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,899.96 : 103,169.51 = 45,132.74 : x
  2. Step 2: Convert to fraction form
    68,899.96/103,169.51 = 45,132.74/x
  3. Step 3: Cross multiply
    68,899.96x = 103,169.51 × 45,132.74
  4. Step 4: Simplify right side
    68,899.96x = 4,656,321,929.25
  5. Step 5: Solve for x
    x = 4,656,321,929.25/68,899.96
  6. Step 6: Final answer
    x = 67,580.91

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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.