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Finding the Fourth Proportional to 157.48, 236.18 and 89.13

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Solution

The fourth proportional to 157.48, 236.18 and 89.13 is: 133.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.48 : 236.18 = 89.13 : x
  2. Step 2: Convert to fraction form
    157.48/236.18 = 89.13/x
  3. Step 3: Cross multiply
    157.48x = 236.18 × 89.13
  4. Step 4: Simplify right side
    157.48x = 21,050.95
  5. Step 5: Solve for x
    x = 21,050.95/157.48
  6. Step 6: Final answer
    x = 133.68

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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.