Home / 67,159.13-100,738.69-20,412

Finding the Fourth Proportional to 67,159.13, 100,738.69 and 20,412

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Solution

The fourth proportional to 67,159.13, 100,738.69 and 20,412 is: 30,618

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,159.13 : 100,738.69 = 20,412 : x
  2. Step 2: Convert to fraction form
    67,159.13/100,738.69 = 20,412/x
  3. Step 3: Cross multiply
    67,159.13x = 100,738.69 × 20,412
  4. Step 4: Simplify right side
    67,159.13x = 2,056,278,089.25
  5. Step 5: Solve for x
    x = 2,056,278,089.25/67,159.13
  6. Step 6: Final answer
    x = 30,618

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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.