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Finding the Fourth Proportional to 62,783.12, 86,649 and 40,491.92

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Solution

The fourth proportional to 62,783.12, 86,649 and 40,491.92 is: 55,884.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,783.12 : 86,649 = 40,491.92 : x
  2. Step 2: Convert to fraction form
    62,783.12/86,649 = 40,491.92/x
  3. Step 3: Cross multiply
    62,783.12x = 86,649 × 40,491.92
  4. Step 4: Simplify right side
    62,783.12x = 3,508,584,376.08
  5. Step 5: Solve for x
    x = 3,508,584,376.08/62,783.12
  6. Step 6: Final answer
    x = 55,884.20

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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.