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Finding the Fourth Proportional to 66,798.78, 100,188.85 and 16,875.78

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Solution

The fourth proportional to 66,798.78, 100,188.85 and 16,875.78 is: 25,311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,798.78 : 100,188.85 = 16,875.78 : x
  2. Step 2: Convert to fraction form
    66,798.78/100,188.85 = 16,875.78/x
  3. Step 3: Cross multiply
    66,798.78x = 100,188.85 × 16,875.78
  4. Step 4: Simplify right side
    66,798.78x = 1,690,764,991.05
  5. Step 5: Solve for x
    x = 1,690,764,991.05/66,798.78
  6. Step 6: Final answer
    x = 25,311.32

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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.