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Finding the Fourth Proportional to 80,285.85, 110,569.76 and 78,542.39

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Solution

The fourth proportional to 80,285.85, 110,569.76 and 78,542.39 is: 108,168.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,285.85 : 110,569.76 = 78,542.39 : x
  2. Step 2: Convert to fraction form
    80,285.85/110,569.76 = 78,542.39/x
  3. Step 3: Cross multiply
    80,285.85x = 110,569.76 × 78,542.39
  4. Step 4: Simplify right side
    80,285.85x = 8,684,413,390.37
  5. Step 5: Solve for x
    x = 8,684,413,390.37/80,285.85
  6. Step 6: Final answer
    x = 108,168.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.