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Finding the Fourth Proportional to 145,105.20, 218,143.80 and 125,859.60

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Solution

The fourth proportional to 145,105.20, 218,143.80 and 125,859.60 is: 189,210.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,105.20 : 218,143.80 = 125,859.60 : x
  2. Step 2: Convert to fraction form
    145,105.20/218,143.80 = 125,859.60/x
  3. Step 3: Cross multiply
    145,105.20x = 218,143.80 × 125,859.60
  4. Step 4: Simplify right side
    145,105.20x = 27,455,491,410.48
  5. Step 5: Solve for x
    x = 27,455,491,410.48/145,105.20
  6. Step 6: Final answer
    x = 189,210.94

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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.