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Finding the Fourth Proportional to 127.15, 190.63 and 58.64

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Solution

The fourth proportional to 127.15, 190.63 and 58.64 is: 87.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.15 : 190.63 = 58.64 : x
  2. Step 2: Convert to fraction form
    127.15/190.63 = 58.64/x
  3. Step 3: Cross multiply
    127.15x = 190.63 × 58.64
  4. Step 4: Simplify right side
    127.15x = 11,177.44
  5. Step 5: Solve for x
    x = 11,177.44/127.15
  6. Step 6: Final answer
    x = 87.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.