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Finding the Fourth Proportional to 66,820.55, 100,199.48 and 38,748.57

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Solution

The fourth proportional to 66,820.55, 100,199.48 and 38,748.57 is: 58,104.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,820.55 : 100,199.48 = 38,748.57 : x
  2. Step 2: Convert to fraction form
    66,820.55/100,199.48 = 38,748.57/x
  3. Step 3: Cross multiply
    66,820.55x = 100,199.48 × 38,748.57
  4. Step 4: Simplify right side
    66,820.55x = 3,882,586,371.00
  5. Step 5: Solve for x
    x = 3,882,586,371.00/66,820.55
  6. Step 6: Final answer
    x = 58,104.68

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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.