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Finding the Fourth Proportional to 114.38, 157.80 and 64.58

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Solution

The fourth proportional to 114.38, 157.80 and 64.58 is: 89.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.38 : 157.80 = 64.58 : x
  2. Step 2: Convert to fraction form
    114.38/157.80 = 64.58/x
  3. Step 3: Cross multiply
    114.38x = 157.80 × 64.58
  4. Step 4: Simplify right side
    114.38x = 10,189.94
  5. Step 5: Solve for x
    x = 10,189.94/114.38
  6. Step 6: Final answer
    x = 89.09

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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.