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Finding the Fourth Proportional to 135,571.78, 203,316.61 and 40,776.78

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Solution

The fourth proportional to 135,571.78, 203,316.61 and 40,776.78 is: 61,152.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,571.78 : 203,316.61 = 40,776.78 : x
  2. Step 2: Convert to fraction form
    135,571.78/203,316.61 = 40,776.78/x
  3. Step 3: Cross multiply
    135,571.78x = 203,316.61 × 40,776.78
  4. Step 4: Simplify right side
    135,571.78x = 8,290,596,676.32
  5. Step 5: Solve for x
    x = 8,290,596,676.32/135,571.78
  6. Step 6: Final answer
    x = 61,152.82

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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.