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Finding the Fourth Proportional to 158,488.31, 218,736.29 and 98,078.42

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Solution

The fourth proportional to 158,488.31, 218,736.29 and 98,078.42 is: 135,362.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,488.31 : 218,736.29 = 98,078.42 : x
  2. Step 2: Convert to fraction form
    158,488.31/218,736.29 = 98,078.42/x
  3. Step 3: Cross multiply
    158,488.31x = 218,736.29 × 98,078.42
  4. Step 4: Simplify right side
    158,488.31x = 21,453,308,135.79
  5. Step 5: Solve for x
    x = 21,453,308,135.79/158,488.31
  6. Step 6: Final answer
    x = 135,362.09

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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.