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Finding the Fourth Proportional to 66,913.20, 100,272.60 and 56,998.80

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Solution

The fourth proportional to 66,913.20, 100,272.60 and 56,998.80 is: 85,415.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,913.20 : 100,272.60 = 56,998.80 : x
  2. Step 2: Convert to fraction form
    66,913.20/100,272.60 = 56,998.80/x
  3. Step 3: Cross multiply
    66,913.20x = 100,272.60 × 56,998.80
  4. Step 4: Simplify right side
    66,913.20x = 5,715,417,872.88
  5. Step 5: Solve for x
    x = 5,715,417,872.88/66,913.20
  6. Step 6: Final answer
    x = 85,415.40

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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.