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Finding the Fourth Proportional to 100.71, 149.99 and 94.50

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Solution

The fourth proportional to 100.71, 149.99 and 94.50 is: 140.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.71 : 149.99 = 94.50 : x
  2. Step 2: Convert to fraction form
    100.71/149.99 = 94.50/x
  3. Step 3: Cross multiply
    100.71x = 149.99 × 94.50
  4. Step 4: Simplify right side
    100.71x = 14,173.58
  5. Step 5: Solve for x
    x = 14,173.58/100.71
  6. Step 6: Final answer
    x = 140.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.