Home / 120,403.90-166,269.07-90,136.68

Finding the Fourth Proportional to 120,403.90, 166,269.07 and 90,136.68

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Solution

The fourth proportional to 120,403.90, 166,269.07 and 90,136.68 is: 124,472.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,403.90 : 166,269.07 = 90,136.68 : x
  2. Step 2: Convert to fraction form
    120,403.90/166,269.07 = 90,136.68/x
  3. Step 3: Cross multiply
    120,403.90x = 166,269.07 × 90,136.68
  4. Step 4: Simplify right side
    120,403.90x = 14,986,942,380.91
  5. Step 5: Solve for x
    x = 14,986,942,380.91/120,403.90
  6. Step 6: Final answer
    x = 124,472.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.