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Finding the Fourth Proportional to 186.79, 257.63 and 113.01

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Solution

The fourth proportional to 186.79, 257.63 and 113.01 is: 155.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.79 : 257.63 = 113.01 : x
  2. Step 2: Convert to fraction form
    186.79/257.63 = 113.01/x
  3. Step 3: Cross multiply
    186.79x = 257.63 × 113.01
  4. Step 4: Simplify right side
    186.79x = 29,114.77
  5. Step 5: Solve for x
    x = 29,114.77/186.79
  6. Step 6: Final answer
    x = 155.87

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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.