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Finding the Fourth Proportional to 155,091.20, 214,027.80 and 91,425.20

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Solution

The fourth proportional to 155,091.20, 214,027.80 and 91,425.20 is: 126,167.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,091.20 : 214,027.80 = 91,425.20 : x
  2. Step 2: Convert to fraction form
    155,091.20/214,027.80 = 91,425.20/x
  3. Step 3: Cross multiply
    155,091.20x = 214,027.80 × 91,425.20
  4. Step 4: Simplify right side
    155,091.20x = 19,567,534,420.56
  5. Step 5: Solve for x
    x = 19,567,534,420.56/155,091.20
  6. Step 6: Final answer
    x = 126,167.92

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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.