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Finding the Fourth Proportional to 62.10, 85.70 and 35.86

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Solution

The fourth proportional to 62.10, 85.70 and 35.86 is: 49.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.10 : 85.70 = 35.86 : x
  2. Step 2: Convert to fraction form
    62.10/85.70 = 35.86/x
  3. Step 3: Cross multiply
    62.10x = 85.70 × 35.86
  4. Step 4: Simplify right side
    62.10x = 3,073.20
  5. Step 5: Solve for x
    x = 3,073.20/62.10
  6. Step 6: Final answer
    x = 49.49

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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.