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Finding the Fourth Proportional to 133,718.40, 200,512.80 and 74,491.20

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Solution

The fourth proportional to 133,718.40, 200,512.80 and 74,491.20 is: 111,700.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,718.40 : 200,512.80 = 74,491.20 : x
  2. Step 2: Convert to fraction form
    133,718.40/200,512.80 = 74,491.20/x
  3. Step 3: Cross multiply
    133,718.40x = 200,512.80 × 74,491.20
  4. Step 4: Simplify right side
    133,718.40x = 14,936,439,087.36
  5. Step 5: Solve for x
    x = 14,936,439,087.36/133,718.40
  6. Step 6: Final answer
    x = 111,700.70

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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.