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Finding the Fourth Proportional to 62,115.78, 85,697.94 and 40,618.11

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Solution

The fourth proportional to 62,115.78, 85,697.94 and 40,618.11 is: 56,038.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,115.78 : 85,697.94 = 40,618.11 : x
  2. Step 2: Convert to fraction form
    62,115.78/85,697.94 = 40,618.11/x
  3. Step 3: Cross multiply
    62,115.78x = 85,697.94 × 40,618.11
  4. Step 4: Simplify right side
    62,115.78x = 3,480,888,353.69
  5. Step 5: Solve for x
    x = 3,480,888,353.69/62,115.78
  6. Step 6: Final answer
    x = 56,038.71

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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.