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Finding the Fourth Proportional to 104.72, 155.93 and 98.50

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Solution

The fourth proportional to 104.72, 155.93 and 98.50 is: 146.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.72 : 155.93 = 98.50 : x
  2. Step 2: Convert to fraction form
    104.72/155.93 = 98.50/x
  3. Step 3: Cross multiply
    104.72x = 155.93 × 98.50
  4. Step 4: Simplify right side
    104.72x = 15,359.11
  5. Step 5: Solve for x
    x = 15,359.11/104.72
  6. Step 6: Final answer
    x = 146.67

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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.