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Finding the Fourth Proportional to 130.78, 196.12 and 62.25

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Solution

The fourth proportional to 130.78, 196.12 and 62.25 is: 93.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.78 : 196.12 = 62.25 : x
  2. Step 2: Convert to fraction form
    130.78/196.12 = 62.25/x
  3. Step 3: Cross multiply
    130.78x = 196.12 × 62.25
  4. Step 4: Simplify right side
    130.78x = 12,208.47
  5. Step 5: Solve for x
    x = 12,208.47/130.78
  6. Step 6: Final answer
    x = 93.35

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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.