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Finding the Fourth Proportional to 191.43, 264 and 139.32

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Solution

The fourth proportional to 191.43, 264 and 139.32 is: 192.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.43 : 264 = 139.32 : x
  2. Step 2: Convert to fraction form
    191.43/264 = 139.32/x
  3. Step 3: Cross multiply
    191.43x = 264 × 139.32
  4. Step 4: Simplify right side
    191.43x = 36,780.48
  5. Step 5: Solve for x
    x = 36,780.48/191.43
  6. Step 6: Final answer
    x = 192.14

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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.