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Finding the Fourth Proportional to 254,687.30, 381,793.43 and 86,090.32

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Solution

The fourth proportional to 254,687.30, 381,793.43 and 86,090.32 is: 129,055.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,687.30 : 381,793.43 = 86,090.32 : x
  2. Step 2: Convert to fraction form
    254,687.30/381,793.43 = 86,090.32/x
  3. Step 3: Cross multiply
    254,687.30x = 381,793.43 × 86,090.32
  4. Step 4: Simplify right side
    254,687.30x = 32,868,718,562.60
  5. Step 5: Solve for x
    x = 32,868,718,562.60/254,687.30
  6. Step 6: Final answer
    x = 129,055.19

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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.