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Finding the Fourth Proportional to 219,679.20, 329,572.80 and 61,905.60

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Solution

The fourth proportional to 219,679.20, 329,572.80 and 61,905.60 is: 92,873.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,679.20 : 329,572.80 = 61,905.60 : x
  2. Step 2: Convert to fraction form
    219,679.20/329,572.80 = 61,905.60/x
  3. Step 3: Cross multiply
    219,679.20x = 329,572.80 × 61,905.60
  4. Step 4: Simplify right side
    219,679.20x = 20,402,401,927.68
  5. Step 5: Solve for x
    x = 20,402,401,927.68/219,679.20
  6. Step 6: Final answer
    x = 92,873.62

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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.