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Finding the Fourth Proportional to 86,119.68, 129,179.28 and 23,790

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Solution

The fourth proportional to 86,119.68, 129,179.28 and 23,790 is: 35,684.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,119.68 : 129,179.28 = 23,790 : x
  2. Step 2: Convert to fraction form
    86,119.68/129,179.28 = 23,790/x
  3. Step 3: Cross multiply
    86,119.68x = 129,179.28 × 23,790
  4. Step 4: Simplify right side
    86,119.68x = 3,073,175,071.20
  5. Step 5: Solve for x
    x = 3,073,175,071.20/86,119.68
  6. Step 6: Final answer
    x = 35,684.93

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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.