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Finding the Fourth Proportional to 150.51, 207.68 and 85.00

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Solution

The fourth proportional to 150.51, 207.68 and 85.00 is: 117.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.51 : 207.68 = 85.00 : x
  2. Step 2: Convert to fraction form
    150.51/207.68 = 85.00/x
  3. Step 3: Cross multiply
    150.51x = 207.68 × 85.00
  4. Step 4: Simplify right side
    150.51x = 17,651.86
  5. Step 5: Solve for x
    x = 17,651.86/150.51
  6. Step 6: Final answer
    x = 117.28

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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.