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Finding the Fourth Proportional to 99.37, 137.14 and 57.91

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Solution

The fourth proportional to 99.37, 137.14 and 57.91 is: 79.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.37 : 137.14 = 57.91 : x
  2. Step 2: Convert to fraction form
    99.37/137.14 = 57.91/x
  3. Step 3: Cross multiply
    99.37x = 137.14 × 57.91
  4. Step 4: Simplify right side
    99.37x = 7,941.78
  5. Step 5: Solve for x
    x = 7,941.78/99.37
  6. Step 6: Final answer
    x = 79.93

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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.