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Finding the Fourth Proportional to 99.93, 149.93 and 48.60

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Solution

The fourth proportional to 99.93, 149.93 and 48.60 is: 72.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.93 : 149.93 = 48.60 : x
  2. Step 2: Convert to fraction form
    99.93/149.93 = 48.60/x
  3. Step 3: Cross multiply
    99.93x = 149.93 × 48.60
  4. Step 4: Simplify right side
    99.93x = 7,286.36
  5. Step 5: Solve for x
    x = 7,286.36/99.93
  6. Step 6: Final answer
    x = 72.91

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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.