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Finding the Fourth Proportional to 62,640.12, 86,442.74 and 34,345.74

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Solution

The fourth proportional to 62,640.12, 86,442.74 and 34,345.74 is: 47,396.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,640.12 : 86,442.74 = 34,345.74 : x
  2. Step 2: Convert to fraction form
    62,640.12/86,442.74 = 34,345.74/x
  3. Step 3: Cross multiply
    62,640.12x = 86,442.74 × 34,345.74
  4. Step 4: Simplify right side
    62,640.12x = 2,968,939,872.93
  5. Step 5: Solve for x
    x = 2,968,939,872.93/62,640.12
  6. Step 6: Final answer
    x = 47,396.78

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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.