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Finding the Fourth Proportional to 215,842.40, 323,763.60 and 132,783.20

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Solution

The fourth proportional to 215,842.40, 323,763.60 and 132,783.20 is: 199,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,842.40 : 323,763.60 = 132,783.20 : x
  2. Step 2: Convert to fraction form
    215,842.40/323,763.60 = 132,783.20/x
  3. Step 3: Cross multiply
    215,842.40x = 323,763.60 × 132,783.20
  4. Step 4: Simplify right side
    215,842.40x = 42,990,366,851.52
  5. Step 5: Solve for x
    x = 42,990,366,851.52/215,842.40
  6. Step 6: Final answer
    x = 199,174.80

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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.