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Finding the Fourth Proportional to 131,257.76, 196,928.08 and 99,818.42

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Solution

The fourth proportional to 131,257.76, 196,928.08 and 99,818.42 is: 149,759.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,257.76 : 196,928.08 = 99,818.42 : x
  2. Step 2: Convert to fraction form
    131,257.76/196,928.08 = 99,818.42/x
  3. Step 3: Cross multiply
    131,257.76x = 196,928.08 × 99,818.42
  4. Step 4: Simplify right side
    131,257.76x = 19,657,049,799.23
  5. Step 5: Solve for x
    x = 19,657,049,799.23/131,257.76
  6. Step 6: Final answer
    x = 149,759.14

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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.