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Finding the Fourth Proportional to 122,240.44, 168,692.42 and 71,288.51

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Solution

The fourth proportional to 122,240.44, 168,692.42 and 71,288.51 is: 98,378.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,240.44 : 168,692.42 = 71,288.51 : x
  2. Step 2: Convert to fraction form
    122,240.44/168,692.42 = 71,288.51/x
  3. Step 3: Cross multiply
    122,240.44x = 168,692.42 × 71,288.51
  4. Step 4: Simplify right side
    122,240.44x = 12,025,831,870.05
  5. Step 5: Solve for x
    x = 12,025,831,870.05/122,240.44
  6. Step 6: Final answer
    x = 98,378.51

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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.