Home / 80,778.83-121,158.98-21,619.12

Finding the Fourth Proportional to 80,778.83, 121,158.98 and 21,619.12

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Solution

The fourth proportional to 80,778.83, 121,158.98 and 21,619.12 is: 32,426.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,778.83 : 121,158.98 = 21,619.12 : x
  2. Step 2: Convert to fraction form
    80,778.83/121,158.98 = 21,619.12/x
  3. Step 3: Cross multiply
    80,778.83x = 121,158.98 × 21,619.12
  4. Step 4: Simplify right side
    80,778.83x = 2,619,349,813.81
  5. Step 5: Solve for x
    x = 2,619,349,813.81/80,778.83
  6. Step 6: Final answer
    x = 32,426.19

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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.