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Finding the Fourth Proportional to 219,693.40, 329,540.10 and 79,456.60

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Solution

The fourth proportional to 219,693.40, 329,540.10 and 79,456.60 is: 119,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,693.40 : 329,540.10 = 79,456.60 : x
  2. Step 2: Convert to fraction form
    219,693.40/329,540.10 = 79,456.60/x
  3. Step 3: Cross multiply
    219,693.40x = 329,540.10 × 79,456.60
  4. Step 4: Simplify right side
    219,693.40x = 26,184,135,909.66
  5. Step 5: Solve for x
    x = 26,184,135,909.66/219,693.40
  6. Step 6: Final answer
    x = 119,184.90

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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.