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Finding the Fourth Proportional to 66,962.15, 100,440.33 and 20,213.63

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Solution

The fourth proportional to 66,962.15, 100,440.33 and 20,213.63 is: 30,319.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,962.15 : 100,440.33 = 20,213.63 : x
  2. Step 2: Convert to fraction form
    66,962.15/100,440.33 = 20,213.63/x
  3. Step 3: Cross multiply
    66,962.15x = 100,440.33 × 20,213.63
  4. Step 4: Simplify right side
    66,962.15x = 2,030,263,165.50
  5. Step 5: Solve for x
    x = 2,030,263,165.50/66,962.15
  6. Step 6: Final answer
    x = 30,319.57

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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.