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Finding the Fourth Proportional to 162.47, 242.78 and 110.69

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Solution

The fourth proportional to 162.47, 242.78 and 110.69 is: 165.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.47 : 242.78 = 110.69 : x
  2. Step 2: Convert to fraction form
    162.47/242.78 = 110.69/x
  3. Step 3: Cross multiply
    162.47x = 242.78 × 110.69
  4. Step 4: Simplify right side
    162.47x = 26,871.55
  5. Step 5: Solve for x
    x = 26,871.55/162.47
  6. Step 6: Final answer
    x = 165.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.