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Finding the Fourth Proportional to 215,627.20, 323,440.80 and 121,148.80

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Solution

The fourth proportional to 215,627.20, 323,440.80 and 121,148.80 is: 181,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,627.20 : 323,440.80 = 121,148.80 : x
  2. Step 2: Convert to fraction form
    215,627.20/323,440.80 = 121,148.80/x
  3. Step 3: Cross multiply
    215,627.20x = 323,440.80 × 121,148.80
  4. Step 4: Simplify right side
    215,627.20x = 39,184,464,791.04
  5. Step 5: Solve for x
    x = 39,184,464,791.04/215,627.20
  6. Step 6: Final answer
    x = 181,723.20

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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.