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Finding the Fourth Proportional to 66,914.20, 100,274.10 and 56,999.80

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Solution

The fourth proportional to 66,914.20, 100,274.10 and 56,999.80 is: 85,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,914.20 : 100,274.10 = 56,999.80 : x
  2. Step 2: Convert to fraction form
    66,914.20/100,274.10 = 56,999.80/x
  3. Step 3: Cross multiply
    66,914.20x = 100,274.10 × 56,999.80
  4. Step 4: Simplify right side
    66,914.20x = 5,715,603,645.18
  5. Step 5: Solve for x
    x = 5,715,603,645.18/66,914.20
  6. Step 6: Final answer
    x = 85,416.90

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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.