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Finding the Fourth Proportional to 219,121.86, 328,731.96 and 69,371.10

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Solution

The fourth proportional to 219,121.86, 328,731.96 and 69,371.10 is: 104,072.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,121.86 : 328,731.96 = 69,371.10 : x
  2. Step 2: Convert to fraction form
    219,121.86/328,731.96 = 69,371.10/x
  3. Step 3: Cross multiply
    219,121.86x = 328,731.96 × 69,371.10
  4. Step 4: Simplify right side
    219,121.86x = 22,804,497,670.36
  5. Step 5: Solve for x
    x = 22,804,497,670.36/219,121.86
  6. Step 6: Final answer
    x = 104,072.22

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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.