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Finding the Fourth Proportional to 158,615.53, 218,895.57 and 86,998.57

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Solution

The fourth proportional to 158,615.53, 218,895.57 and 86,998.57 is: 120,061.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,615.53 : 218,895.57 = 86,998.57 : x
  2. Step 2: Convert to fraction form
    158,615.53/218,895.57 = 86,998.57/x
  3. Step 3: Cross multiply
    158,615.53x = 218,895.57 × 86,998.57
  4. Step 4: Simplify right side
    158,615.53x = 19,043,601,569.33
  5. Step 5: Solve for x
    x = 19,043,601,569.33/158,615.53
  6. Step 6: Final answer
    x = 120,061.39

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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.