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Finding the Fourth Proportional to 151,199.66, 208,664.12 and 86,679.56

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Solution

The fourth proportional to 151,199.66, 208,664.12 and 86,679.56 is: 119,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,199.66 : 208,664.12 = 86,679.56 : x
  2. Step 2: Convert to fraction form
    151,199.66/208,664.12 = 86,679.56/x
  3. Step 3: Cross multiply
    151,199.66x = 208,664.12 × 86,679.56
  4. Step 4: Simplify right side
    151,199.66x = 18,086,914,109.39
  5. Step 5: Solve for x
    x = 18,086,914,109.39/151,199.66
  6. Step 6: Final answer
    x = 119,622.72

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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.