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Finding the Fourth Proportional to 158,379.78, 218,567.63 and 90,395.42

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Solution

The fourth proportional to 158,379.78, 218,567.63 and 90,395.42 is: 124,747.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,379.78 : 218,567.63 = 90,395.42 : x
  2. Step 2: Convert to fraction form
    158,379.78/218,567.63 = 90,395.42/x
  3. Step 3: Cross multiply
    158,379.78x = 218,567.63 × 90,395.42
  4. Step 4: Simplify right side
    158,379.78x = 19,757,512,712.25
  5. Step 5: Solve for x
    x = 19,757,512,712.25/158,379.78
  6. Step 6: Final answer
    x = 124,747.70

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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.