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Finding the Fourth Proportional to 109.35, 150.87 and 62.70

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Solution

The fourth proportional to 109.35, 150.87 and 62.70 is: 86.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.35 : 150.87 = 62.70 : x
  2. Step 2: Convert to fraction form
    109.35/150.87 = 62.70/x
  3. Step 3: Cross multiply
    109.35x = 150.87 × 62.70
  4. Step 4: Simplify right side
    109.35x = 9,459.55
  5. Step 5: Solve for x
    x = 9,459.55/109.35
  6. Step 6: Final answer
    x = 86.51

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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.