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Finding the Fourth Proportional to 209,073.68, 313,633.31 and 66,885.53

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Solution

The fourth proportional to 209,073.68, 313,633.31 and 66,885.53 is: 100,335.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,073.68 : 313,633.31 = 66,885.53 : x
  2. Step 2: Convert to fraction form
    209,073.68/313,633.31 = 66,885.53/x
  3. Step 3: Cross multiply
    209,073.68x = 313,633.31 × 66,885.53
  4. Step 4: Simplify right side
    209,073.68x = 20,977,529,438.54
  5. Step 5: Solve for x
    x = 20,977,529,438.54/209,073.68
  6. Step 6: Final answer
    x = 100,335.58

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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.