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Finding the Fourth Proportional to 212.51, 293.30 and 134.87

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Solution

The fourth proportional to 212.51, 293.30 and 134.87 is: 186.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.51 : 293.30 = 134.87 : x
  2. Step 2: Convert to fraction form
    212.51/293.30 = 134.87/x
  3. Step 3: Cross multiply
    212.51x = 293.30 × 134.87
  4. Step 4: Simplify right side
    212.51x = 39,557.37
  5. Step 5: Solve for x
    x = 39,557.37/212.51
  6. Step 6: Final answer
    x = 186.14

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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.