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Finding the Fourth Proportional to 127.90, 176.55 and 88.55

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Solution

The fourth proportional to 127.90, 176.55 and 88.55 is: 122.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.90 : 176.55 = 88.55 : x
  2. Step 2: Convert to fraction form
    127.90/176.55 = 88.55/x
  3. Step 3: Cross multiply
    127.90x = 176.55 × 88.55
  4. Step 4: Simplify right side
    127.90x = 15,632.95
  5. Step 5: Solve for x
    x = 15,632.95/127.90
  6. Step 6: Final answer
    x = 122.23

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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.