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Finding the Fourth Proportional to 162.77, 243.59 and 117.21

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Solution

The fourth proportional to 162.77, 243.59 and 117.21 is: 175.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.77 : 243.59 = 117.21 : x
  2. Step 2: Convert to fraction form
    162.77/243.59 = 117.21/x
  3. Step 3: Cross multiply
    162.77x = 243.59 × 117.21
  4. Step 4: Simplify right side
    162.77x = 28,550.60
  5. Step 5: Solve for x
    x = 28,550.60/162.77
  6. Step 6: Final answer
    x = 175.40

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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.