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Finding the Fourth Proportional to 162.34, 224.02 and 100.15

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Solution

The fourth proportional to 162.34, 224.02 and 100.15 is: 138.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.34 : 224.02 = 100.15 : x
  2. Step 2: Convert to fraction form
    162.34/224.02 = 100.15/x
  3. Step 3: Cross multiply
    162.34x = 224.02 × 100.15
  4. Step 4: Simplify right side
    162.34x = 22,434.79
  5. Step 5: Solve for x
    x = 22,434.79/162.34
  6. Step 6: Final answer
    x = 138.20

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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.