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Finding the Fourth Proportional to 138,073.68, 190,605.88 and 104,096

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Solution

The fourth proportional to 138,073.68, 190,605.88 and 104,096 is: 143,700.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,073.68 : 190,605.88 = 104,096 : x
  2. Step 2: Convert to fraction form
    138,073.68/190,605.88 = 104,096/x
  3. Step 3: Cross multiply
    138,073.68x = 190,605.88 × 104,096
  4. Step 4: Simplify right side
    138,073.68x = 19,841,309,684.48
  5. Step 5: Solve for x
    x = 19,841,309,684.48/138,073.68
  6. Step 6: Final answer
    x = 143,700.88

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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.