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Finding the Fourth Proportional to 130.33, 195.43 and 84.70

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Solution

The fourth proportional to 130.33, 195.43 and 84.70 is: 127.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.33 : 195.43 = 84.70 : x
  2. Step 2: Convert to fraction form
    130.33/195.43 = 84.70/x
  3. Step 3: Cross multiply
    130.33x = 195.43 × 84.70
  4. Step 4: Simplify right side
    130.33x = 16,552.92
  5. Step 5: Solve for x
    x = 16,552.92/130.33
  6. Step 6: Final answer
    x = 127.01

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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.