Home / 85,451.16-128,257.17-43,361.45

Finding the Fourth Proportional to 85,451.16, 128,257.17 and 43,361.45

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Solution

The fourth proportional to 85,451.16, 128,257.17 and 43,361.45 is: 65,082.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451.16 : 128,257.17 = 43,361.45 : x
  2. Step 2: Convert to fraction form
    85,451.16/128,257.17 = 43,361.45/x
  3. Step 3: Cross multiply
    85,451.16x = 128,257.17 × 43,361.45
  4. Step 4: Simplify right side
    85,451.16x = 5,561,416,222.81
  5. Step 5: Solve for x
    x = 5,561,416,222.81/85,451.16
  6. Step 6: Final answer
    x = 65,082.98

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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.