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Finding the Fourth Proportional to 158,505.39, 218,736.40 and 86,888.43

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Solution

The fourth proportional to 158,505.39, 218,736.40 and 86,888.43 is: 119,905.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,505.39 : 218,736.40 = 86,888.43 : x
  2. Step 2: Convert to fraction form
    158,505.39/218,736.40 = 86,888.43/x
  3. Step 3: Cross multiply
    158,505.39x = 218,736.40 × 86,888.43
  4. Step 4: Simplify right side
    158,505.39x = 19,005,662,379.85
  5. Step 5: Solve for x
    x = 19,005,662,379.85/158,505.39
  6. Step 6: Final answer
    x = 119,905.46

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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.