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Finding the Fourth Proportional to 100,114.53, 138,192.62 and 57,689.97

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Solution

The fourth proportional to 100,114.53, 138,192.62 and 57,689.97 is: 79,632.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,114.53 : 138,192.62 = 57,689.97 : x
  2. Step 2: Convert to fraction form
    100,114.53/138,192.62 = 57,689.97/x
  3. Step 3: Cross multiply
    100,114.53x = 138,192.62 × 57,689.97
  4. Step 4: Simplify right side
    100,114.53x = 7,972,327,813.57
  5. Step 5: Solve for x
    x = 7,972,327,813.57/100,114.53
  6. Step 6: Final answer
    x = 79,632.08

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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.