Home / 72,857.08-109,285.80-20,266.57

Finding the Fourth Proportional to 72,857.08, 109,285.80 and 20,266.57

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Solution

The fourth proportional to 72,857.08, 109,285.80 and 20,266.57 is: 30,399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,857.08 : 109,285.80 = 20,266.57 : x
  2. Step 2: Convert to fraction form
    72,857.08/109,285.80 = 20,266.57/x
  3. Step 3: Cross multiply
    72,857.08x = 109,285.80 × 20,266.57
  4. Step 4: Simplify right side
    72,857.08x = 2,214,848,315.71
  5. Step 5: Solve for x
    x = 2,214,848,315.71/72,857.08
  6. Step 6: Final answer
    x = 30,399.91

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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.