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Finding the Fourth Proportional to 100.51, 150.81 and 73.68

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Solution

The fourth proportional to 100.51, 150.81 and 73.68 is: 110.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.51 : 150.81 = 73.68 : x
  2. Step 2: Convert to fraction form
    100.51/150.81 = 73.68/x
  3. Step 3: Cross multiply
    100.51x = 150.81 × 73.68
  4. Step 4: Simplify right side
    100.51x = 11,111.25
  5. Step 5: Solve for x
    x = 11,111.25/100.51
  6. Step 6: Final answer
    x = 110.55

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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.