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Finding the Fourth Proportional to 131,796.80, 197,505.90 and 74,915.90

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Solution

The fourth proportional to 131,796.80, 197,505.90 and 74,915.90 is: 112,266.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,796.80 : 197,505.90 = 74,915.90 : x
  2. Step 2: Convert to fraction form
    131,796.80/197,505.90 = 74,915.90/x
  3. Step 3: Cross multiply
    131,796.80x = 197,505.90 × 74,915.90
  4. Step 4: Simplify right side
    131,796.80x = 14,796,332,253.81
  5. Step 5: Solve for x
    x = 14,796,332,253.81/131,796.80
  6. Step 6: Final answer
    x = 112,266.25

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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.