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Finding the Fourth Proportional to 100,571.39, 138,726.96 and 59,707.78

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Solution

The fourth proportional to 100,571.39, 138,726.96 and 59,707.78 is: 82,360.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,571.39 : 138,726.96 = 59,707.78 : x
  2. Step 2: Convert to fraction form
    100,571.39/138,726.96 = 59,707.78/x
  3. Step 3: Cross multiply
    100,571.39x = 138,726.96 × 59,707.78
  4. Step 4: Simplify right side
    100,571.39x = 8,283,079,005.30
  5. Step 5: Solve for x
    x = 8,283,079,005.30/100,571.39
  6. Step 6: Final answer
    x = 82,360.19

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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.