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Finding the Fourth Proportional to 139.55, 209.35 and 62.53

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Solution

The fourth proportional to 139.55, 209.35 and 62.53 is: 93.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.55 : 209.35 = 62.53 : x
  2. Step 2: Convert to fraction form
    139.55/209.35 = 62.53/x
  3. Step 3: Cross multiply
    139.55x = 209.35 × 62.53
  4. Step 4: Simplify right side
    139.55x = 13,090.66
  5. Step 5: Solve for x
    x = 13,090.66/139.55
  6. Step 6: Final answer
    x = 93.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.