Home / 72,729.63-109,082.09-20,126.82

Finding the Fourth Proportional to 72,729.63, 109,082.09 and 20,126.82

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Solution

The fourth proportional to 72,729.63, 109,082.09 and 20,126.82 is: 30,186.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,729.63 : 109,082.09 = 20,126.82 : x
  2. Step 2: Convert to fraction form
    72,729.63/109,082.09 = 20,126.82/x
  3. Step 3: Cross multiply
    72,729.63x = 109,082.09 × 20,126.82
  4. Step 4: Simplify right side
    72,729.63x = 2,195,475,490.02
  5. Step 5: Solve for x
    x = 2,195,475,490.02/72,729.63
  6. Step 6: Final answer
    x = 30,186.81

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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.