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Finding the Fourth Proportional to 145.38, 217.10 and 127.16

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Solution

The fourth proportional to 145.38, 217.10 and 127.16 is: 189.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.38 : 217.10 = 127.16 : x
  2. Step 2: Convert to fraction form
    145.38/217.10 = 127.16/x
  3. Step 3: Cross multiply
    145.38x = 217.10 × 127.16
  4. Step 4: Simplify right side
    145.38x = 27,606.48
  5. Step 5: Solve for x
    x = 27,606.48/145.38
  6. Step 6: Final answer
    x = 189.89

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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.