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Finding the Fourth Proportional to 66,909.10, 100,363.65 and 56,022.70

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Solution

The fourth proportional to 66,909.10, 100,363.65 and 56,022.70 is: 84,034.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,909.10 : 100,363.65 = 56,022.70 : x
  2. Step 2: Convert to fraction form
    66,909.10/100,363.65 = 56,022.70/x
  3. Step 3: Cross multiply
    66,909.10x = 100,363.65 × 56,022.70
  4. Step 4: Simplify right side
    66,909.10x = 5,622,642,654.86
  5. Step 5: Solve for x
    x = 5,622,642,654.86/66,909.10
  6. Step 6: Final answer
    x = 84,034.05

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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.