Home / 72,871.13-109,306.70-20,281.98

Finding the Fourth Proportional to 72,871.13, 109,306.70 and 20,281.98

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Solution

The fourth proportional to 72,871.13, 109,306.70 and 20,281.98 is: 30,422.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,871.13 : 109,306.70 = 20,281.98 : x
  2. Step 2: Convert to fraction form
    72,871.13/109,306.70 = 20,281.98/x
  3. Step 3: Cross multiply
    72,871.13x = 109,306.70 × 20,281.98
  4. Step 4: Simplify right side
    72,871.13x = 2,216,956,201.86
  5. Step 5: Solve for x
    x = 2,216,956,201.86/72,871.13
  6. Step 6: Final answer
    x = 30,422.97

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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.