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Finding the Fourth Proportional to 196, 293.72 and 93.20

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Solution

The fourth proportional to 196, 293.72 and 93.20 is: 139.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    196 : 293.72 = 93.20 : x
  2. Step 2: Convert to fraction form
    196/293.72 = 93.20/x
  3. Step 3: Cross multiply
    196x = 293.72 × 93.20
  4. Step 4: Simplify right side
    196x = 27,374.70
  5. Step 5: Solve for x
    x = 27,374.70/196
  6. Step 6: Final answer
    x = 139.67

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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.