Home / 120,724.16-181,016.03-80,788.79

Finding the Fourth Proportional to 120,724.16, 181,016.03 and 80,788.79

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Solution

The fourth proportional to 120,724.16, 181,016.03 and 80,788.79 is: 121,136.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,724.16 : 181,016.03 = 80,788.79 : x
  2. Step 2: Convert to fraction form
    120,724.16/181,016.03 = 80,788.79/x
  3. Step 3: Cross multiply
    120,724.16x = 181,016.03 × 80,788.79
  4. Step 4: Simplify right side
    120,724.16x = 14,624,066,688.82
  5. Step 5: Solve for x
    x = 14,624,066,688.82/120,724.16
  6. Step 6: Final answer
    x = 121,136.21

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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.