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Finding the Fourth Proportional to 120,235.39, 165,977.99 and 71,854.39

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Solution

The fourth proportional to 120,235.39, 165,977.99 and 71,854.39 is: 99,190.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,235.39 : 165,977.99 = 71,854.39 : x
  2. Step 2: Convert to fraction form
    120,235.39/165,977.99 = 71,854.39/x
  3. Step 3: Cross multiply
    120,235.39x = 165,977.99 × 71,854.39
  4. Step 4: Simplify right side
    120,235.39x = 11,926,247,224.88
  5. Step 5: Solve for x
    x = 11,926,247,224.88/120,235.39
  6. Step 6: Final answer
    x = 99,190.82

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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.