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Finding the Fourth Proportional to 120,738.40, 166,620.84 and 67,026.88

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Solution

The fourth proportional to 120,738.40, 166,620.84 and 67,026.88 is: 92,498.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,738.40 : 166,620.84 = 67,026.88 : x
  2. Step 2: Convert to fraction form
    120,738.40/166,620.84 = 67,026.88/x
  3. Step 3: Cross multiply
    120,738.40x = 166,620.84 × 67,026.88
  4. Step 4: Simplify right side
    120,738.40x = 11,168,075,048.18
  5. Step 5: Solve for x
    x = 11,168,075,048.18/120,738.40
  6. Step 6: Final answer
    x = 92,498.12

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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.