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Finding the Fourth Proportional to 131,426.40, 197,139.60 and 75,957.60

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Solution

The fourth proportional to 131,426.40, 197,139.60 and 75,957.60 is: 113,936.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,426.40 : 197,139.60 = 75,957.60 : x
  2. Step 2: Convert to fraction form
    131,426.40/197,139.60 = 75,957.60/x
  3. Step 3: Cross multiply
    131,426.40x = 197,139.60 × 75,957.60
  4. Step 4: Simplify right side
    131,426.40x = 14,974,250,880.96
  5. Step 5: Solve for x
    x = 14,974,250,880.96/131,426.40
  6. Step 6: Final answer
    x = 113,936.40

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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.