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Finding the Fourth Proportional to 99.56, 137.37 and 58.08

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Solution

The fourth proportional to 99.56, 137.37 and 58.08 is: 80.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.56 : 137.37 = 58.08 : x
  2. Step 2: Convert to fraction form
    99.56/137.37 = 58.08/x
  3. Step 3: Cross multiply
    99.56x = 137.37 × 58.08
  4. Step 4: Simplify right side
    99.56x = 7,978.45
  5. Step 5: Solve for x
    x = 7,978.45/99.56
  6. Step 6: Final answer
    x = 80.14

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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.