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Finding the Fourth Proportional to 158,062.51, 218,129.44 and 86,447.13

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Solution

The fourth proportional to 158,062.51, 218,129.44 and 86,447.13 is: 119,298.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,062.51 : 218,129.44 = 86,447.13 : x
  2. Step 2: Convert to fraction form
    158,062.51/218,129.44 = 86,447.13/x
  3. Step 3: Cross multiply
    158,062.51x = 218,129.44 × 86,447.13
  4. Step 4: Simplify right side
    158,062.51x = 18,856,664,817.95
  5. Step 5: Solve for x
    x = 18,856,664,817.95/158,062.51
  6. Step 6: Final answer
    x = 119,298.78

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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.