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Finding the Fourth Proportional to 139.63, 209.60 and 58.53

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Solution

The fourth proportional to 139.63, 209.60 and 58.53 is: 87.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.63 : 209.60 = 58.53 : x
  2. Step 2: Convert to fraction form
    139.63/209.60 = 58.53/x
  3. Step 3: Cross multiply
    139.63x = 209.60 × 58.53
  4. Step 4: Simplify right side
    139.63x = 12,267.60
  5. Step 5: Solve for x
    x = 12,267.60/139.63
  6. Step 6: Final answer
    x = 87.86

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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.