Home / 81,259.74-121,349.61-80,380.08

Finding the Fourth Proportional to 81,259.74, 121,349.61 and 80,380.08

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Solution

The fourth proportional to 81,259.74, 121,349.61 and 80,380.08 is: 120,035.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.74 : 121,349.61 = 80,380.08 : x
  2. Step 2: Convert to fraction form
    81,259.74/121,349.61 = 80,380.08/x
  3. Step 3: Cross multiply
    81,259.74x = 121,349.61 × 80,380.08
  4. Step 4: Simplify right side
    81,259.74x = 9,754,091,359.77
  5. Step 5: Solve for x
    x = 9,754,091,359.77/81,259.74
  6. Step 6: Final answer
    x = 120,035.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.