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Finding the Fourth Proportional to 162.64, 243.42 and 147.66

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Solution

The fourth proportional to 162.64, 243.42 and 147.66 is: 221.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.64 : 243.42 = 147.66 : x
  2. Step 2: Convert to fraction form
    162.64/243.42 = 147.66/x
  3. Step 3: Cross multiply
    162.64x = 243.42 × 147.66
  4. Step 4: Simplify right side
    162.64x = 35,943.40
  5. Step 5: Solve for x
    x = 35,943.40/162.64
  6. Step 6: Final answer
    x = 221.00

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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.