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Finding the Fourth Proportional to 219,761.46, 329,642.16 and 79,487.28

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Solution

The fourth proportional to 219,761.46, 329,642.16 and 79,487.28 is: 119,230.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,761.46 : 329,642.16 = 79,487.28 : x
  2. Step 2: Convert to fraction form
    219,761.46/329,642.16 = 79,487.28/x
  3. Step 3: Cross multiply
    219,761.46x = 329,642.16 × 79,487.28
  4. Step 4: Simplify right side
    219,761.46x = 26,202,358,671.72
  5. Step 5: Solve for x
    x = 26,202,358,671.72/219,761.46
  6. Step 6: Final answer
    x = 119,230.91

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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.