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Finding the Fourth Proportional to 189.16, 283.58 and 128.14

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Solution

The fourth proportional to 189.16, 283.58 and 128.14 is: 192.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.16 : 283.58 = 128.14 : x
  2. Step 2: Convert to fraction form
    189.16/283.58 = 128.14/x
  3. Step 3: Cross multiply
    189.16x = 283.58 × 128.14
  4. Step 4: Simplify right side
    189.16x = 36,337.94
  5. Step 5: Solve for x
    x = 36,337.94/189.16
  6. Step 6: Final answer
    x = 192.10

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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.