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Finding the Fourth Proportional to 225,978.45, 338,987.38 and 74,130

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Solution

The fourth proportional to 225,978.45, 338,987.38 and 74,130 is: 111,201.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,978.45 : 338,987.38 = 74,130 : x
  2. Step 2: Convert to fraction form
    225,978.45/338,987.38 = 74,130/x
  3. Step 3: Cross multiply
    225,978.45x = 338,987.38 × 74,130
  4. Step 4: Simplify right side
    225,978.45x = 25,129,134,294.08
  5. Step 5: Solve for x
    x = 25,129,134,294.08/225,978.45
  6. Step 6: Final answer
    x = 111,201.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.