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Finding the Fourth Proportional to 66,738.60, 100,107.90 and 66,349.80

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Solution

The fourth proportional to 66,738.60, 100,107.90 and 66,349.80 is: 99,524.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,738.60 : 100,107.90 = 66,349.80 : x
  2. Step 2: Convert to fraction form
    66,738.60/100,107.90 = 66,349.80/x
  3. Step 3: Cross multiply
    66,738.60x = 100,107.90 × 66,349.80
  4. Step 4: Simplify right side
    66,738.60x = 6,642,139,143.42
  5. Step 5: Solve for x
    x = 6,642,139,143.42/66,738.60
  6. Step 6: Final answer
    x = 99,524.70

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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.