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Finding the Fourth Proportional to 223.18, 307.99 and 124.92

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Solution

The fourth proportional to 223.18, 307.99 and 124.92 is: 172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.18 : 307.99 = 124.92 : x
  2. Step 2: Convert to fraction form
    223.18/307.99 = 124.92/x
  3. Step 3: Cross multiply
    223.18x = 307.99 × 124.92
  4. Step 4: Simplify right side
    223.18x = 38,474.11
  5. Step 5: Solve for x
    x = 38,474.11/223.18
  6. Step 6: Final answer
    x = 172.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.