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Finding the Fourth Proportional to 188.68, 283.02 and 85.94

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Solution

The fourth proportional to 188.68, 283.02 and 85.94 is: 128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.68 : 283.02 = 85.94 : x
  2. Step 2: Convert to fraction form
    188.68/283.02 = 85.94/x
  3. Step 3: Cross multiply
    188.68x = 283.02 × 85.94
  4. Step 4: Simplify right side
    188.68x = 24,322.74
  5. Step 5: Solve for x
    x = 24,322.74/188.68
  6. Step 6: Final answer
    x = 128.91

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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.