Home / 65,441.21-90,306.41-39,990.14

Finding the Fourth Proportional to 65,441.21, 90,306.41 and 39,990.14

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Solution

The fourth proportional to 65,441.21, 90,306.41 and 39,990.14 is: 55,184.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,441.21 : 90,306.41 = 39,990.14 : x
  2. Step 2: Convert to fraction form
    65,441.21/90,306.41 = 39,990.14/x
  3. Step 3: Cross multiply
    65,441.21x = 90,306.41 × 39,990.14
  4. Step 4: Simplify right side
    65,441.21x = 3,611,365,527.27
  5. Step 5: Solve for x
    x = 3,611,365,527.27/65,441.21
  6. Step 6: Final answer
    x = 55,184.88

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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.