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Finding the Fourth Proportional to 61.60, 85.02 and 35.38

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Solution

The fourth proportional to 61.60, 85.02 and 35.38 is: 48.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.60 : 85.02 = 35.38 : x
  2. Step 2: Convert to fraction form
    61.60/85.02 = 35.38/x
  3. Step 3: Cross multiply
    61.60x = 85.02 × 35.38
  4. Step 4: Simplify right side
    61.60x = 3,007.41
  5. Step 5: Solve for x
    x = 3,007.41/61.60
  6. Step 6: Final answer
    x = 48.82

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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.