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Finding the Fourth Proportional to 137.54, 205.95 and 99.07

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Solution

The fourth proportional to 137.54, 205.95 and 99.07 is: 148.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.54 : 205.95 = 99.07 : x
  2. Step 2: Convert to fraction form
    137.54/205.95 = 99.07/x
  3. Step 3: Cross multiply
    137.54x = 205.95 × 99.07
  4. Step 4: Simplify right side
    137.54x = 20,403.47
  5. Step 5: Solve for x
    x = 20,403.47/137.54
  6. Step 6: Final answer
    x = 148.35

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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.