Home / 67,128.46-100,686.18-20,381.74

Finding the Fourth Proportional to 67,128.46, 100,686.18 and 20,381.74

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Solution

The fourth proportional to 67,128.46, 100,686.18 and 20,381.74 is: 30,570.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,128.46 : 100,686.18 = 20,381.74 : x
  2. Step 2: Convert to fraction form
    67,128.46/100,686.18 = 20,381.74/x
  3. Step 3: Cross multiply
    67,128.46x = 100,686.18 × 20,381.74
  4. Step 4: Simplify right side
    67,128.46x = 2,052,159,542.35
  5. Step 5: Solve for x
    x = 2,052,159,542.35/67,128.46
  6. Step 6: Final answer
    x = 30,570.63

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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.