Home / 72,869.49-109,304.37-20,278.98

Finding the Fourth Proportional to 72,869.49, 109,304.37 and 20,278.98

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Solution

The fourth proportional to 72,869.49, 109,304.37 and 20,278.98 is: 30,418.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,869.49 : 109,304.37 = 20,278.98 : x
  2. Step 2: Convert to fraction form
    72,869.49/109,304.37 = 20,278.98/x
  3. Step 3: Cross multiply
    72,869.49x = 109,304.37 × 20,278.98
  4. Step 4: Simplify right side
    72,869.49x = 2,216,581,133.14
  5. Step 5: Solve for x
    x = 2,216,581,133.14/72,869.49
  6. Step 6: Final answer
    x = 30,418.51

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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.