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Finding the Fourth Proportional to 89.61, 124.50 and 88.53

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Solution

The fourth proportional to 89.61, 124.50 and 88.53 is: 123.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.61 : 124.50 = 88.53 : x
  2. Step 2: Convert to fraction form
    89.61/124.50 = 88.53/x
  3. Step 3: Cross multiply
    89.61x = 124.50 × 88.53
  4. Step 4: Simplify right side
    89.61x = 11,022.05
  5. Step 5: Solve for x
    x = 11,022.05/89.61
  6. Step 6: Final answer
    x = 123.00

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.