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Finding the Fourth Proportional to 162.30, 223.36 and 130.55

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Solution

The fourth proportional to 162.30, 223.36 and 130.55 is: 179.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.30 : 223.36 = 130.55 : x
  2. Step 2: Convert to fraction form
    162.30/223.36 = 130.55/x
  3. Step 3: Cross multiply
    162.30x = 223.36 × 130.55
  4. Step 4: Simplify right side
    162.30x = 29,158.20
  5. Step 5: Solve for x
    x = 29,158.20/162.30
  6. Step 6: Final answer
    x = 179.65

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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.