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Finding the Fourth Proportional to 131,140.80, 196,759.80 and 42,397.20

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Solution

The fourth proportional to 131,140.80, 196,759.80 and 42,397.20 is: 63,611.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,140.80 : 196,759.80 = 42,397.20 : x
  2. Step 2: Convert to fraction form
    131,140.80/196,759.80 = 42,397.20/x
  3. Step 3: Cross multiply
    131,140.80x = 196,759.80 × 42,397.20
  4. Step 4: Simplify right side
    131,140.80x = 8,342,064,592.56
  5. Step 5: Solve for x
    x = 8,342,064,592.56/131,140.80
  6. Step 6: Final answer
    x = 63,611.51

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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.