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Finding the Fourth Proportional to 219,639.70, 329,513.55 and 61,866.10

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Solution

The fourth proportional to 219,639.70, 329,513.55 and 61,866.10 is: 92,814.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,639.70 : 329,513.55 = 61,866.10 : x
  2. Step 2: Convert to fraction form
    219,639.70/329,513.55 = 61,866.10/x
  3. Step 3: Cross multiply
    219,639.70x = 329,513.55 × 61,866.10
  4. Step 4: Simplify right side
    219,639.70x = 20,385,718,235.66
  5. Step 5: Solve for x
    x = 20,385,718,235.66/219,639.70
  6. Step 6: Final answer
    x = 92,814.36

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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.