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Finding the Fourth Proportional to 66,698.60, 100,266.60 and 47,112.80

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Solution

The fourth proportional to 66,698.60, 100,266.60 and 47,112.80 is: 70,823.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,698.60 : 100,266.60 = 47,112.80 : x
  2. Step 2: Convert to fraction form
    66,698.60/100,266.60 = 47,112.80/x
  3. Step 3: Cross multiply
    66,698.60x = 100,266.60 × 47,112.80
  4. Step 4: Simplify right side
    66,698.60x = 4,723,840,272.48
  5. Step 5: Solve for x
    x = 4,723,840,272.48/66,698.60
  6. Step 6: Final answer
    x = 70,823.68

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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.