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Finding the Fourth Proportional to 131,478.75, 197,119.71 and 42,679.26

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Solution

The fourth proportional to 131,478.75, 197,119.71 and 42,679.26 is: 63,986.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,478.75 : 197,119.71 = 42,679.26 : x
  2. Step 2: Convert to fraction form
    131,478.75/197,119.71 = 42,679.26/x
  3. Step 3: Cross multiply
    131,478.75x = 197,119.71 × 42,679.26
  4. Step 4: Simplify right side
    131,478.75x = 8,412,923,354.21
  5. Step 5: Solve for x
    x = 8,412,923,354.21/131,478.75
  6. Step 6: Final answer
    x = 63,986.94

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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.