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Finding the Fourth Proportional to 133.07, 183.57 and 89.40

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Solution

The fourth proportional to 133.07, 183.57 and 89.40 is: 123.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.07 : 183.57 = 89.40 : x
  2. Step 2: Convert to fraction form
    133.07/183.57 = 89.40/x
  3. Step 3: Cross multiply
    133.07x = 183.57 × 89.40
  4. Step 4: Simplify right side
    133.07x = 16,411.16
  5. Step 5: Solve for x
    x = 16,411.16/133.07
  6. Step 6: Final answer
    x = 123.33

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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.