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Finding the Fourth Proportional to 66,965.15, 100,444.83 and 20,216.63

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Solution

The fourth proportional to 66,965.15, 100,444.83 and 20,216.63 is: 30,324.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,965.15 : 100,444.83 = 20,216.63 : x
  2. Step 2: Convert to fraction form
    66,965.15/100,444.83 = 20,216.63/x
  3. Step 3: Cross multiply
    66,965.15x = 100,444.83 × 20,216.63
  4. Step 4: Simplify right side
    66,965.15x = 2,030,655,461.30
  5. Step 5: Solve for x
    x = 2,030,655,461.30/66,965.15
  6. Step 6: Final answer
    x = 30,324.07

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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.