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Finding the Fourth Proportional to 192.61, 266.14 and 155.71

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Solution

The fourth proportional to 192.61, 266.14 and 155.71 is: 215.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.61 : 266.14 = 155.71 : x
  2. Step 2: Convert to fraction form
    192.61/266.14 = 155.71/x
  3. Step 3: Cross multiply
    192.61x = 266.14 × 155.71
  4. Step 4: Simplify right side
    192.61x = 41,438.81
  5. Step 5: Solve for x
    x = 41,438.81/192.61
  6. Step 6: Final answer
    x = 215.14

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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.