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Finding the Fourth Proportional to 88,169.64, 121,685.24 and 54,640.68

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Solution

The fourth proportional to 88,169.64, 121,685.24 and 54,640.68 is: 75,411.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,169.64 : 121,685.24 = 54,640.68 : x
  2. Step 2: Convert to fraction form
    88,169.64/121,685.24 = 54,640.68/x
  3. Step 3: Cross multiply
    88,169.64x = 121,685.24 × 54,640.68
  4. Step 4: Simplify right side
    88,169.64x = 6,648,964,259.56
  5. Step 5: Solve for x
    x = 6,648,964,259.56/88,169.64
  6. Step 6: Final answer
    x = 75,411.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.