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Finding the Fourth Proportional to 138,799.82, 191,866.57 and 123,840.74

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Solution

The fourth proportional to 138,799.82, 191,866.57 and 123,840.74 is: 171,188.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,799.82 : 191,866.57 = 123,840.74 : x
  2. Step 2: Convert to fraction form
    138,799.82/191,866.57 = 123,840.74/x
  3. Step 3: Cross multiply
    138,799.82x = 191,866.57 × 123,840.74
  4. Step 4: Simplify right side
    138,799.82x = 23,760,898,180.13
  5. Step 5: Solve for x
    x = 23,760,898,180.13/138,799.82
  6. Step 6: Final answer
    x = 171,188.25

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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.