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Finding the Fourth Proportional to 123,282, 170,129.36 and 66,693.38

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Solution

The fourth proportional to 123,282, 170,129.36 and 66,693.38 is: 92,036.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,282 : 170,129.36 = 66,693.38 : x
  2. Step 2: Convert to fraction form
    123,282/170,129.36 = 66,693.38/x
  3. Step 3: Cross multiply
    123,282x = 170,129.36 × 66,693.38
  4. Step 4: Simplify right side
    123,282x = 11,346,501,371.72
  5. Step 5: Solve for x
    x = 11,346,501,371.72/123,282
  6. Step 6: Final answer
    x = 92,036.97

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1.5x scale

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.