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Finding the Fourth Proportional to 87,615, 120,908.88 and 49,889.28

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Solution

The fourth proportional to 87,615, 120,908.88 and 49,889.28 is: 68,847.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,615 : 120,908.88 = 49,889.28 : x
  2. Step 2: Convert to fraction form
    87,615/120,908.88 = 49,889.28/x
  3. Step 3: Cross multiply
    87,615x = 120,908.88 × 49,889.28
  4. Step 4: Simplify right side
    87,615x = 6,032,056,968.81
  5. Step 5: Solve for x
    x = 6,032,056,968.81/87,615
  6. Step 6: Final answer
    x = 68,847.31

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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.