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Finding the Fourth Proportional to 140,282.64, 210,489.56 and 81,168.04

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Solution

The fourth proportional to 140,282.64, 210,489.56 and 81,168.04 is: 121,790.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,282.64 : 210,489.56 = 81,168.04 : x
  2. Step 2: Convert to fraction form
    140,282.64/210,489.56 = 81,168.04/x
  3. Step 3: Cross multiply
    140,282.64x = 210,489.56 × 81,168.04
  4. Step 4: Simplify right side
    140,282.64x = 17,085,025,025.66
  5. Step 5: Solve for x
    x = 17,085,025,025.66/140,282.64
  6. Step 6: Final answer
    x = 121,790.02

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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.