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Finding the Fourth Proportional to 201,920.47, 278,652.15 and 111,279.75

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Solution

The fourth proportional to 201,920.47, 278,652.15 and 111,279.75 is: 153,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,920.47 : 278,652.15 = 111,279.75 : x
  2. Step 2: Convert to fraction form
    201,920.47/278,652.15 = 111,279.75/x
  3. Step 3: Cross multiply
    201,920.47x = 278,652.15 × 111,279.75
  4. Step 4: Simplify right side
    201,920.47x = 31,008,341,327.73
  5. Step 5: Solve for x
    x = 31,008,341,327.73/201,920.47
  6. Step 6: Final answer
    x = 153,567.10

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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.