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Finding the Fourth Proportional to 62.94, 86.33 and 61.20

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Solution

The fourth proportional to 62.94, 86.33 and 61.20 is: 83.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.94 : 86.33 = 61.20 : x
  2. Step 2: Convert to fraction form
    62.94/86.33 = 61.20/x
  3. Step 3: Cross multiply
    62.94x = 86.33 × 61.20
  4. Step 4: Simplify right side
    62.94x = 5,283.40
  5. Step 5: Solve for x
    x = 5,283.40/62.94
  6. Step 6: Final answer
    x = 83.94

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.