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Finding the Fourth Proportional to 78,871.94, 108,843.53 and 50,577.74

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Solution

The fourth proportional to 78,871.94, 108,843.53 and 50,577.74 is: 69,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.94 : 108,843.53 = 50,577.74 : x
  2. Step 2: Convert to fraction form
    78,871.94/108,843.53 = 50,577.74/x
  3. Step 3: Cross multiply
    78,871.94x = 108,843.53 × 50,577.74
  4. Step 4: Simplify right side
    78,871.94x = 5,505,058,963.92
  5. Step 5: Solve for x
    x = 5,505,058,963.92/78,871.94
  6. Step 6: Final answer
    x = 69,797.44

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1.5x scale

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.