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Finding the Fourth Proportional to 158,378.78, 218,566.25 and 90,394.42

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Solution

The fourth proportional to 158,378.78, 218,566.25 and 90,394.42 is: 124,746.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,378.78 : 218,566.25 = 90,394.42 : x
  2. Step 2: Convert to fraction form
    158,378.78/218,566.25 = 90,394.42/x
  3. Step 3: Cross multiply
    158,378.78x = 218,566.25 × 90,394.42
  4. Step 4: Simplify right side
    158,378.78x = 19,757,169,400.33
  5. Step 5: Solve for x
    x = 19,757,169,400.33/158,378.78
  6. Step 6: Final answer
    x = 124,746.32

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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.