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Finding the Fourth Proportional to 104.95, 145.51 and 99.48

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Solution

The fourth proportional to 104.95, 145.51 and 99.48 is: 137.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.95 : 145.51 = 99.48 : x
  2. Step 2: Convert to fraction form
    104.95/145.51 = 99.48/x
  3. Step 3: Cross multiply
    104.95x = 145.51 × 99.48
  4. Step 4: Simplify right side
    104.95x = 14,475.33
  5. Step 5: Solve for x
    x = 14,475.33/104.95
  6. Step 6: Final answer
    x = 137.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.