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Finding the Fourth Proportional to 158,342.00, 218,503.62 and 86,720.49

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Solution

The fourth proportional to 158,342.00, 218,503.62 and 86,720.49 is: 119,669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,342.00 : 218,503.62 = 86,720.49 : x
  2. Step 2: Convert to fraction form
    158,342.00/218,503.62 = 86,720.49/x
  3. Step 3: Cross multiply
    158,342.00x = 218,503.62 × 86,720.49
  4. Step 4: Simplify right side
    158,342.00x = 18,948,740,993.17
  5. Step 5: Solve for x
    x = 18,948,740,993.17/158,342.00
  6. Step 6: Final answer
    x = 119,669.71

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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.