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Finding the Fourth Proportional to 219,369, 329,053.55 and 79,127.61

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Solution

The fourth proportional to 219,369, 329,053.55 and 79,127.61 is: 118,691.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,369 : 329,053.55 = 79,127.61 : x
  2. Step 2: Convert to fraction form
    219,369/329,053.55 = 79,127.61/x
  3. Step 3: Cross multiply
    219,369x = 329,053.55 × 79,127.61
  4. Step 4: Simplify right side
    219,369x = 26,037,220,577.88
  5. Step 5: Solve for x
    x = 26,037,220,577.88/219,369
  6. Step 6: Final answer
    x = 118,691.43

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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.