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Finding the Fourth Proportional to 80,434.80, 111,108.24 and 61,804.80

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Solution

The fourth proportional to 80,434.80, 111,108.24 and 61,804.80 is: 85,373.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,434.80 : 111,108.24 = 61,804.80 : x
  2. Step 2: Convert to fraction form
    80,434.80/111,108.24 = 61,804.80/x
  3. Step 3: Cross multiply
    80,434.80x = 111,108.24 × 61,804.80
  4. Step 4: Simplify right side
    80,434.80x = 6,867,022,551.55
  5. Step 5: Solve for x
    x = 6,867,022,551.55/80,434.80
  6. Step 6: Final answer
    x = 85,373.78

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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.