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Finding the Fourth Proportional to 127.59, 176.08 and 71.58

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Solution

The fourth proportional to 127.59, 176.08 and 71.58 is: 98.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.59 : 176.08 = 71.58 : x
  2. Step 2: Convert to fraction form
    127.59/176.08 = 71.58/x
  3. Step 3: Cross multiply
    127.59x = 176.08 × 71.58
  4. Step 4: Simplify right side
    127.59x = 12,603.81
  5. Step 5: Solve for x
    x = 12,603.81/127.59
  6. Step 6: Final answer
    x = 98.78

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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.