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Finding the Fourth Proportional to 89.09, 133.59 and 56.58

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Solution

The fourth proportional to 89.09, 133.59 and 56.58 is: 84.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.09 : 133.59 = 56.58 : x
  2. Step 2: Convert to fraction form
    89.09/133.59 = 56.58/x
  3. Step 3: Cross multiply
    89.09x = 133.59 × 56.58
  4. Step 4: Simplify right side
    89.09x = 7,558.52
  5. Step 5: Solve for x
    x = 7,558.52/89.09
  6. Step 6: Final answer
    x = 84.84

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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.