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Finding the Fourth Proportional to 80,679.69, 120,884.94 and 56,948.31

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Solution

The fourth proportional to 80,679.69, 120,884.94 and 56,948.31 is: 85,327.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,679.69 : 120,884.94 = 56,948.31 : x
  2. Step 2: Convert to fraction form
    80,679.69/120,884.94 = 56,948.31/x
  3. Step 3: Cross multiply
    80,679.69x = 120,884.94 × 56,948.31
  4. Step 4: Simplify right side
    80,679.69x = 6,884,193,037.45
  5. Step 5: Solve for x
    x = 6,884,193,037.45/80,679.69
  6. Step 6: Final answer
    x = 85,327.46

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1.5x scale

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.