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Finding the Fourth Proportional to 62,979.87, 86,840.12 and 47,037.39

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Solution

The fourth proportional to 62,979.87, 86,840.12 and 47,037.39 is: 64,857.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,979.87 : 86,840.12 = 47,037.39 : x
  2. Step 2: Convert to fraction form
    62,979.87/86,840.12 = 47,037.39/x
  3. Step 3: Cross multiply
    62,979.87x = 86,840.12 × 47,037.39
  4. Step 4: Simplify right side
    62,979.87x = 4,084,732,356.90
  5. Step 5: Solve for x
    x = 4,084,732,356.90/62,979.87
  6. Step 6: Final answer
    x = 64,857.75

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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.