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Finding the Fourth Proportional to 157.21, 235.18 and 148.00

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Solution

The fourth proportional to 157.21, 235.18 and 148.00 is: 221.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.21 : 235.18 = 148.00 : x
  2. Step 2: Convert to fraction form
    157.21/235.18 = 148.00/x
  3. Step 3: Cross multiply
    157.21x = 235.18 × 148.00
  4. Step 4: Simplify right side
    157.21x = 34,805.46
  5. Step 5: Solve for x
    x = 34,805.46/157.21
  6. Step 6: Final answer
    x = 221.39

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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.