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Finding the Fourth Proportional to 127.33, 175.46 and 90.45

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Solution

The fourth proportional to 127.33, 175.46 and 90.45 is: 124.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.33 : 175.46 = 90.45 : x
  2. Step 2: Convert to fraction form
    127.33/175.46 = 90.45/x
  3. Step 3: Cross multiply
    127.33x = 175.46 × 90.45
  4. Step 4: Simplify right side
    127.33x = 15,869.90
  5. Step 5: Solve for x
    x = 15,869.90/127.33
  6. Step 6: Final answer
    x = 124.64

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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.