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Finding the Fourth Proportional to 145,910.40, 218,865.60 and 121,027.20

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Solution

The fourth proportional to 145,910.40, 218,865.60 and 121,027.20 is: 181,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,910.40 : 218,865.60 = 121,027.20 : x
  2. Step 2: Convert to fraction form
    145,910.40/218,865.60 = 121,027.20/x
  3. Step 3: Cross multiply
    145,910.40x = 218,865.60 × 121,027.20
  4. Step 4: Simplify right side
    145,910.40x = 26,488,690,744.32
  5. Step 5: Solve for x
    x = 26,488,690,744.32/145,910.40
  6. Step 6: Final answer
    x = 181,540.80

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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.