Home / 80,692.14-121,054.62-28,105.72

Finding the Fourth Proportional to 80,692.14, 121,054.62 and 28,105.72

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Solution

The fourth proportional to 80,692.14, 121,054.62 and 28,105.72 is: 42,164.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,692.14 : 121,054.62 = 28,105.72 : x
  2. Step 2: Convert to fraction form
    80,692.14/121,054.62 = 28,105.72/x
  3. Step 3: Cross multiply
    80,692.14x = 121,054.62 × 28,105.72
  4. Step 4: Simplify right side
    80,692.14x = 3,402,327,254.43
  5. Step 5: Solve for x
    x = 3,402,327,254.43/80,692.14
  6. Step 6: Final answer
    x = 42,164.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.