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Finding the Fourth Proportional to 123,231.31, 170,046.44 and 90,983.08

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Solution

The fourth proportional to 123,231.31, 170,046.44 and 90,983.08 is: 125,547.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,231.31 : 170,046.44 = 90,983.08 : x
  2. Step 2: Convert to fraction form
    123,231.31/170,046.44 = 90,983.08/x
  3. Step 3: Cross multiply
    123,231.31x = 170,046.44 × 90,983.08
  4. Step 4: Simplify right side
    123,231.31x = 15,471,348,953.06
  5. Step 5: Solve for x
    x = 15,471,348,953.06/123,231.31
  6. Step 6: Final answer
    x = 125,547.23

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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.