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Finding the Fourth Proportional to 219,992.30, 329,989.67 and 79,747.28

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Solution

The fourth proportional to 219,992.30, 329,989.67 and 79,747.28 is: 119,621.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,992.30 : 329,989.67 = 79,747.28 : x
  2. Step 2: Convert to fraction form
    219,992.30/329,989.67 = 79,747.28/x
  3. Step 3: Cross multiply
    219,992.30x = 329,989.67 × 79,747.28
  4. Step 4: Simplify right side
    219,992.30x = 26,315,776,561.91
  5. Step 5: Solve for x
    x = 26,315,776,561.91/219,992.30
  6. Step 6: Final answer
    x = 119,621.36

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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.