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Finding the Fourth Proportional to 63,640.79, 87,840.17 and 36,798.78

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Solution

The fourth proportional to 63,640.79, 87,840.17 and 36,798.78 is: 50,791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,640.79 : 87,840.17 = 36,798.78 : x
  2. Step 2: Convert to fraction form
    63,640.79/87,840.17 = 36,798.78/x
  3. Step 3: Cross multiply
    63,640.79x = 87,840.17 × 36,798.78
  4. Step 4: Simplify right side
    63,640.79x = 3,232,411,230.84
  5. Step 5: Solve for x
    x = 3,232,411,230.84/63,640.79
  6. Step 6: Final answer
    x = 50,791.50

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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.