Home / 80,938.71-121,407.66-21,769.56

Finding the Fourth Proportional to 80,938.71, 121,407.66 and 21,769.56

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Solution

The fourth proportional to 80,938.71, 121,407.66 and 21,769.56 is: 32,654.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,938.71 : 121,407.66 = 21,769.56 : x
  2. Step 2: Convert to fraction form
    80,938.71/121,407.66 = 21,769.56/x
  3. Step 3: Cross multiply
    80,938.71x = 121,407.66 × 21,769.56
  4. Step 4: Simplify right side
    80,938.71x = 2,642,991,338.83
  5. Step 5: Solve for x
    x = 2,642,991,338.83/80,938.71
  6. Step 6: Final answer
    x = 32,654.23

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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.