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Finding the Fourth Proportional to 75.34, 112.83 and 61.06

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Solution

The fourth proportional to 75.34, 112.83 and 61.06 is: 91.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.34 : 112.83 = 61.06 : x
  2. Step 2: Convert to fraction form
    75.34/112.83 = 61.06/x
  3. Step 3: Cross multiply
    75.34x = 112.83 × 61.06
  4. Step 4: Simplify right side
    75.34x = 6,889.40
  5. Step 5: Solve for x
    x = 6,889.40/75.34
  6. Step 6: Final answer
    x = 91.44

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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.