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Finding the Fourth Proportional to 127.95, 176.63 and 100.24

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Solution

The fourth proportional to 127.95, 176.63 and 100.24 is: 138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.95 : 176.63 = 100.24 : x
  2. Step 2: Convert to fraction form
    127.95/176.63 = 100.24/x
  3. Step 3: Cross multiply
    127.95x = 176.63 × 100.24
  4. Step 4: Simplify right side
    127.95x = 17,705.39
  5. Step 5: Solve for x
    x = 17,705.39/127.95
  6. Step 6: Final answer
    x = 138.38

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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.