Home / 120,419.79-166,206.92-80,135.25

Finding the Fourth Proportional to 120,419.79, 166,206.92 and 80,135.25

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Solution

The fourth proportional to 120,419.79, 166,206.92 and 80,135.25 is: 110,605.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,419.79 : 166,206.92 = 80,135.25 : x
  2. Step 2: Convert to fraction form
    120,419.79/166,206.92 = 80,135.25/x
  3. Step 3: Cross multiply
    120,419.79x = 166,206.92 × 80,135.25
  4. Step 4: Simplify right side
    120,419.79x = 13,319,032,685.25
  5. Step 5: Solve for x
    x = 13,319,032,685.25/120,419.79
  6. Step 6: Final answer
    x = 110,605.02

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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.