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Finding the Fourth Proportional to 63,642.97, 87,827.79 and 39,783.70

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Solution

The fourth proportional to 63,642.97, 87,827.79 and 39,783.70 is: 54,901.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,642.97 : 87,827.79 = 39,783.70 : x
  2. Step 2: Convert to fraction form
    63,642.97/87,827.79 = 39,783.70/x
  3. Step 3: Cross multiply
    63,642.97x = 87,827.79 × 39,783.70
  4. Step 4: Simplify right side
    63,642.97x = 3,494,114,449.02
  5. Step 5: Solve for x
    x = 3,494,114,449.02/63,642.97
  6. Step 6: Final answer
    x = 54,901.81

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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.