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Finding the Fourth Proportional to 133,072.40, 183,640.38 and 72,644.38

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Solution

The fourth proportional to 133,072.40, 183,640.38 and 72,644.38 is: 100,249.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,072.40 : 183,640.38 = 72,644.38 : x
  2. Step 2: Convert to fraction form
    133,072.40/183,640.38 = 72,644.38/x
  3. Step 3: Cross multiply
    133,072.40x = 183,640.38 × 72,644.38
  4. Step 4: Simplify right side
    133,072.40x = 13,340,441,548.06
  5. Step 5: Solve for x
    x = 13,340,441,548.06/133,072.40
  6. Step 6: Final answer
    x = 100,249.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.