Home / 80,912.24-121,409.28-54,561.59

Finding the Fourth Proportional to 80,912.24, 121,409.28 and 54,561.59

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Solution

The fourth proportional to 80,912.24, 121,409.28 and 54,561.59 is: 81,869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,912.24 : 121,409.28 = 54,561.59 : x
  2. Step 2: Convert to fraction form
    80,912.24/121,409.28 = 54,561.59/x
  3. Step 3: Cross multiply
    80,912.24x = 121,409.28 × 54,561.59
  4. Step 4: Simplify right side
    80,912.24x = 6,624,282,750.51
  5. Step 5: Solve for x
    x = 6,624,282,750.51/80,912.24
  6. Step 6: Final answer
    x = 81,869.98

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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.