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Finding the Fourth Proportional to 150.91, 207.80 and 140.02

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Solution

The fourth proportional to 150.91, 207.80 and 140.02 is: 192.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.91 : 207.80 = 140.02 : x
  2. Step 2: Convert to fraction form
    150.91/207.80 = 140.02/x
  3. Step 3: Cross multiply
    150.91x = 207.80 × 140.02
  4. Step 4: Simplify right side
    150.91x = 29,096.16
  5. Step 5: Solve for x
    x = 29,096.16/150.91
  6. Step 6: Final answer
    x = 192.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.