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Finding the Fourth Proportional to 139.51, 209.10 and 58.27

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Solution

The fourth proportional to 139.51, 209.10 and 58.27 is: 87.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.51 : 209.10 = 58.27 : x
  2. Step 2: Convert to fraction form
    139.51/209.10 = 58.27/x
  3. Step 3: Cross multiply
    139.51x = 209.10 × 58.27
  4. Step 4: Simplify right side
    139.51x = 12,184.26
  5. Step 5: Solve for x
    x = 12,184.26/139.51
  6. Step 6: Final answer
    x = 87.34

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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.