Home / 80,697.64-121,102.14-28,107.56

Finding the Fourth Proportional to 80,697.64, 121,102.14 and 28,107.56

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Solution

The fourth proportional to 80,697.64, 121,102.14 and 28,107.56 is: 42,180.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,697.64 : 121,102.14 = 28,107.56 : x
  2. Step 2: Convert to fraction form
    80,697.64/121,102.14 = 28,107.56/x
  3. Step 3: Cross multiply
    80,697.64x = 121,102.14 × 28,107.56
  4. Step 4: Simplify right side
    80,697.64x = 3,403,885,666.18
  5. Step 5: Solve for x
    x = 3,403,885,666.18/80,697.64
  6. Step 6: Final answer
    x = 42,180.73

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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.