Home / 80,895.78-121,398.30-28,305.72

Finding the Fourth Proportional to 80,895.78, 121,398.30 and 28,305.72

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Solution

The fourth proportional to 80,895.78, 121,398.30 and 28,305.72 is: 42,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,895.78 : 121,398.30 = 28,305.72 : x
  2. Step 2: Convert to fraction form
    80,895.78/121,398.30 = 28,305.72/x
  3. Step 3: Cross multiply
    80,895.78x = 121,398.30 × 28,305.72
  4. Step 4: Simplify right side
    80,895.78x = 3,436,266,288.28
  5. Step 5: Solve for x
    x = 3,436,266,288.28/80,895.78
  6. Step 6: Final answer
    x = 42,477.70

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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.