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Finding the Fourth Proportional to 131,891.48, 197,629.73 and 101,978.79

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Solution

The fourth proportional to 131,891.48, 197,629.73 and 101,978.79 is: 152,807.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,891.48 : 197,629.73 = 101,978.79 : x
  2. Step 2: Convert to fraction form
    131,891.48/197,629.73 = 101,978.79/x
  3. Step 3: Cross multiply
    131,891.48x = 197,629.73 × 101,978.79
  4. Step 4: Simplify right side
    131,891.48x = 20,154,040,733.43
  5. Step 5: Solve for x
    x = 20,154,040,733.43/131,891.48
  6. Step 6: Final answer
    x = 152,807.75

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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.