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Finding the Fourth Proportional to 62,979.86, 86,912.80 and 34,685.66

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Solution

The fourth proportional to 62,979.86, 86,912.80 and 34,685.66 is: 47,866.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,979.86 : 86,912.80 = 34,685.66 : x
  2. Step 2: Convert to fraction form
    62,979.86/86,912.80 = 34,685.66/x
  3. Step 3: Cross multiply
    62,979.86x = 86,912.80 × 34,685.66
  4. Step 4: Simplify right side
    62,979.86x = 3,014,627,830.45
  5. Step 5: Solve for x
    x = 3,014,627,830.45/62,979.86
  6. Step 6: Final answer
    x = 47,866.54

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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.