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Finding the Fourth Proportional to 108.70, 149.99 and 62.06

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Solution

The fourth proportional to 108.70, 149.99 and 62.06 is: 85.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.70 : 149.99 = 62.06 : x
  2. Step 2: Convert to fraction form
    108.70/149.99 = 62.06/x
  3. Step 3: Cross multiply
    108.70x = 149.99 × 62.06
  4. Step 4: Simplify right side
    108.70x = 9,308.38
  5. Step 5: Solve for x
    x = 9,308.38/108.70
  6. Step 6: Final answer
    x = 85.63

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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.