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Finding the Fourth Proportional to 80,625.94, 111,009.69 and 73,152.55

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Solution

The fourth proportional to 80,625.94, 111,009.69 and 73,152.55 is: 100,719.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,625.94 : 111,009.69 = 73,152.55 : x
  2. Step 2: Convert to fraction form
    80,625.94/111,009.69 = 73,152.55/x
  3. Step 3: Cross multiply
    80,625.94x = 111,009.69 × 73,152.55
  4. Step 4: Simplify right side
    80,625.94x = 8,120,641,898.21
  5. Step 5: Solve for x
    x = 8,120,641,898.21/80,625.94
  6. Step 6: Final answer
    x = 100,719.97

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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.