Home / 80,890.36-121,277.22-28,285.72

Finding the Fourth Proportional to 80,890.36, 121,277.22 and 28,285.72

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Solution

The fourth proportional to 80,890.36, 121,277.22 and 28,285.72 is: 42,408.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,890.36 : 121,277.22 = 28,285.72 : x
  2. Step 2: Convert to fraction form
    80,890.36/121,277.22 = 28,285.72/x
  3. Step 3: Cross multiply
    80,890.36x = 121,277.22 × 28,285.72
  4. Step 4: Simplify right side
    80,890.36x = 3,430,413,487.30
  5. Step 5: Solve for x
    x = 3,430,413,487.30/80,890.36
  6. Step 6: Final answer
    x = 42,408.19

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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.