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Finding the Fourth Proportional to 127.33, 175.69 and 99.70

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Solution

The fourth proportional to 127.33, 175.69 and 99.70 is: 137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.33 : 175.69 = 99.70 : x
  2. Step 2: Convert to fraction form
    127.33/175.69 = 99.70/x
  3. Step 3: Cross multiply
    127.33x = 175.69 × 99.70
  4. Step 4: Simplify right side
    127.33x = 17,516.29
  5. Step 5: Solve for x
    x = 17,516.29/127.33
  6. Step 6: Final answer
    x = 137.57

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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.