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Finding the Fourth Proportional to 80,077.97, 120,189.40 and 42,669.64

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Solution

The fourth proportional to 80,077.97, 120,189.40 and 42,669.64 is: 64,043.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,077.97 : 120,189.40 = 42,669.64 : x
  2. Step 2: Convert to fraction form
    80,077.97/120,189.40 = 42,669.64/x
  3. Step 3: Cross multiply
    80,077.97x = 120,189.40 × 42,669.64
  4. Step 4: Simplify right side
    80,077.97x = 5,128,438,022.67
  5. Step 5: Solve for x
    x = 5,128,438,022.67/80,077.97
  6. Step 6: Final answer
    x = 64,043.06

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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.