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Finding the Fourth Proportional to 100.84, 151.11 and 46.72

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Solution

The fourth proportional to 100.84, 151.11 and 46.72 is: 70.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.84 : 151.11 = 46.72 : x
  2. Step 2: Convert to fraction form
    100.84/151.11 = 46.72/x
  3. Step 3: Cross multiply
    100.84x = 151.11 × 46.72
  4. Step 4: Simplify right side
    100.84x = 7,059.86
  5. Step 5: Solve for x
    x = 7,059.86/100.84
  6. Step 6: Final answer
    x = 70.01

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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.