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Finding the Fourth Proportional to 66,903.88, 100,344.48 and 20,145.88

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Solution

The fourth proportional to 66,903.88, 100,344.48 and 20,145.88 is: 30,215.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,903.88 : 100,344.48 = 20,145.88 : x
  2. Step 2: Convert to fraction form
    66,903.88/100,344.48 = 20,145.88/x
  3. Step 3: Cross multiply
    66,903.88x = 100,344.48 × 20,145.88
  4. Step 4: Simplify right side
    66,903.88x = 2,021,527,852.74
  5. Step 5: Solve for x
    x = 2,021,527,852.74/66,903.88
  6. Step 6: Final answer
    x = 30,215.41

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1.5x scale

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.