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Finding the Fourth Proportional to 145,091.20, 218,122.80 and 125,845.60

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Solution

The fourth proportional to 145,091.20, 218,122.80 and 125,845.60 is: 189,189.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,091.20 : 218,122.80 = 125,845.60 : x
  2. Step 2: Convert to fraction form
    145,091.20/218,122.80 = 125,845.60/x
  3. Step 3: Cross multiply
    145,091.20x = 218,122.80 × 125,845.60
  4. Step 4: Simplify right side
    145,091.20x = 27,449,794,639.68
  5. Step 5: Solve for x
    x = 27,449,794,639.68/145,091.20
  6. Step 6: Final answer
    x = 189,189.93

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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.