Home / 80,758.08-121,157.28-28,168

Finding the Fourth Proportional to 80,758.08, 121,157.28 and 28,168

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Solution

The fourth proportional to 80,758.08, 121,157.28 and 28,168 is: 42,259.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,758.08 : 121,157.28 = 28,168 : x
  2. Step 2: Convert to fraction form
    80,758.08/121,157.28 = 28,168/x
  3. Step 3: Cross multiply
    80,758.08x = 121,157.28 × 28,168
  4. Step 4: Simplify right side
    80,758.08x = 3,412,758,263.04
  5. Step 5: Solve for x
    x = 3,412,758,263.04/80,758.08
  6. Step 6: Final answer
    x = 42,259.03

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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.