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Finding the Fourth Proportional to 90.00, 125.01 and 88.60

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Solution

The fourth proportional to 90.00, 125.01 and 88.60 is: 123.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.00 : 125.01 = 88.60 : x
  2. Step 2: Convert to fraction form
    90.00/125.01 = 88.60/x
  3. Step 3: Cross multiply
    90.00x = 125.01 × 88.60
  4. Step 4: Simplify right side
    90.00x = 11,076.26
  5. Step 5: Solve for x
    x = 11,076.26/90.00
  6. Step 6: Final answer
    x = 123.07

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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.