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Finding the Fourth Proportional to 215,784.60, 323,701.20 and 66,023.70

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Solution

The fourth proportional to 215,784.60, 323,701.20 and 66,023.70 is: 99,042.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,784.60 : 323,701.20 = 66,023.70 : x
  2. Step 2: Convert to fraction form
    215,784.60/323,701.20 = 66,023.70/x
  3. Step 3: Cross multiply
    215,784.60x = 323,701.20 × 66,023.70
  4. Step 4: Simplify right side
    215,784.60x = 21,371,950,918.44
  5. Step 5: Solve for x
    x = 21,371,950,918.44/215,784.60
  6. Step 6: Final answer
    x = 99,042.99

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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.