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Finding the Fourth Proportional to 133,081.01, 183,650.67 and 72,650.78

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Solution

The fourth proportional to 133,081.01, 183,650.67 and 72,650.78 is: 100,257.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,081.01 : 183,650.67 = 72,650.78 : x
  2. Step 2: Convert to fraction form
    133,081.01/183,650.67 = 72,650.78/x
  3. Step 3: Cross multiply
    133,081.01x = 183,650.67 × 72,650.78
  4. Step 4: Simplify right side
    133,081.01x = 13,342,364,423.02
  5. Step 5: Solve for x
    x = 13,342,364,423.02/133,081.01
  6. Step 6: Final answer
    x = 100,257.46

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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.