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Finding the Fourth Proportional to 150.78, 207.14 and 129.98

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Solution

The fourth proportional to 150.78, 207.14 and 129.98 is: 178.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.78 : 207.14 = 129.98 : x
  2. Step 2: Convert to fraction form
    150.78/207.14 = 129.98/x
  3. Step 3: Cross multiply
    150.78x = 207.14 × 129.98
  4. Step 4: Simplify right side
    150.78x = 26,924.06
  5. Step 5: Solve for x
    x = 26,924.06/150.78
  6. Step 6: Final answer
    x = 178.57

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.