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Finding the Fourth Proportional to 191.39, 264.21 and 117.77

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Solution

The fourth proportional to 191.39, 264.21 and 117.77 is: 162.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.39 : 264.21 = 117.77 : x
  2. Step 2: Convert to fraction form
    191.39/264.21 = 117.77/x
  3. Step 3: Cross multiply
    191.39x = 264.21 × 117.77
  4. Step 4: Simplify right side
    191.39x = 31,116.01
  5. Step 5: Solve for x
    x = 31,116.01/191.39
  6. Step 6: Final answer
    x = 162.58

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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.