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Finding the Fourth Proportional to 219,640.70, 329,515.05 and 61,867.10

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Solution

The fourth proportional to 219,640.70, 329,515.05 and 61,867.10 is: 92,815.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,640.70 : 329,515.05 = 61,867.10 : x
  2. Step 2: Convert to fraction form
    219,640.70/329,515.05 = 61,867.10/x
  3. Step 3: Cross multiply
    219,640.70x = 329,515.05 × 61,867.10
  4. Step 4: Simplify right side
    219,640.70x = 20,386,140,549.86
  5. Step 5: Solve for x
    x = 20,386,140,549.86/219,640.70
  6. Step 6: Final answer
    x = 92,815.86

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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.