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Finding the Fourth Proportional to 162.35, 242.33 and 139.67

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Solution

The fourth proportional to 162.35, 242.33 and 139.67 is: 208.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.35 : 242.33 = 139.67 : x
  2. Step 2: Convert to fraction form
    162.35/242.33 = 139.67/x
  3. Step 3: Cross multiply
    162.35x = 242.33 × 139.67
  4. Step 4: Simplify right side
    162.35x = 33,846.23
  5. Step 5: Solve for x
    x = 33,846.23/162.35
  6. Step 6: Final answer
    x = 208.48

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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.