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Finding the Fourth Proportional to 97.83, 134.70 and 83.05

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Solution

The fourth proportional to 97.83, 134.70 and 83.05 is: 114.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.83 : 134.70 = 83.05 : x
  2. Step 2: Convert to fraction form
    97.83/134.70 = 83.05/x
  3. Step 3: Cross multiply
    97.83x = 134.70 × 83.05
  4. Step 4: Simplify right side
    97.83x = 11,186.77
  5. Step 5: Solve for x
    x = 11,186.77/97.83
  6. Step 6: Final answer
    x = 114.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.