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Finding the Fourth Proportional to 123,703.81, 170,605.96 and 86,067.97

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Solution

The fourth proportional to 123,703.81, 170,605.96 and 86,067.97 is: 118,700.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,703.81 : 170,605.96 = 86,067.97 : x
  2. Step 2: Convert to fraction form
    123,703.81/170,605.96 = 86,067.97/x
  3. Step 3: Cross multiply
    123,703.81x = 170,605.96 × 86,067.97
  4. Step 4: Simplify right side
    123,703.81x = 14,683,708,647.10
  5. Step 5: Solve for x
    x = 14,683,708,647.10/123,703.81
  6. Step 6: Final answer
    x = 118,700.54

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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.