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Finding the Fourth Proportional to 162.79, 224.70 and 107.55

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Solution

The fourth proportional to 162.79, 224.70 and 107.55 is: 148.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.79 : 224.70 = 107.55 : x
  2. Step 2: Convert to fraction form
    162.79/224.70 = 107.55/x
  3. Step 3: Cross multiply
    162.79x = 224.70 × 107.55
  4. Step 4: Simplify right side
    162.79x = 24,166.49
  5. Step 5: Solve for x
    x = 24,166.49/162.79
  6. Step 6: Final answer
    x = 148.45

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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.