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Finding the Fourth Proportional to 99.48, 137.25 and 58.00

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Solution

The fourth proportional to 99.48, 137.25 and 58.00 is: 80.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.48 : 137.25 = 58.00 : x
  2. Step 2: Convert to fraction form
    99.48/137.25 = 58.00/x
  3. Step 3: Cross multiply
    99.48x = 137.25 × 58.00
  4. Step 4: Simplify right side
    99.48x = 7,960.91
  5. Step 5: Solve for x
    x = 7,960.91/99.48
  6. Step 6: Final answer
    x = 80.03

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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.