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Finding the Fourth Proportional to 158.56, 237.60 and 90.05

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Solution

The fourth proportional to 158.56, 237.60 and 90.05 is: 134.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.56 : 237.60 = 90.05 : x
  2. Step 2: Convert to fraction form
    158.56/237.60 = 90.05/x
  3. Step 3: Cross multiply
    158.56x = 237.60 × 90.05
  4. Step 4: Simplify right side
    158.56x = 21,394.69
  5. Step 5: Solve for x
    x = 21,394.69/158.56
  6. Step 6: Final answer
    x = 134.93

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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.