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Finding the Fourth Proportional to 215,848.60, 323,772.90 and 84,520.60

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Solution

The fourth proportional to 215,848.60, 323,772.90 and 84,520.60 is: 126,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,848.60 : 323,772.90 = 84,520.60 : x
  2. Step 2: Convert to fraction form
    215,848.60/323,772.90 = 84,520.60/x
  3. Step 3: Cross multiply
    215,848.60x = 323,772.90 × 84,520.60
  4. Step 4: Simplify right side
    215,848.60x = 27,365,479,771.74
  5. Step 5: Solve for x
    x = 27,365,479,771.74/215,848.60
  6. Step 6: Final answer
    x = 126,780.90

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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.