Home / 85,531.40-128,297.10-82,032.20

Finding the Fourth Proportional to 85,531.40, 128,297.10 and 82,032.20

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Solution

The fourth proportional to 85,531.40, 128,297.10 and 82,032.20 is: 123,048.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,531.40 : 128,297.10 = 82,032.20 : x
  2. Step 2: Convert to fraction form
    85,531.40/128,297.10 = 82,032.20/x
  3. Step 3: Cross multiply
    85,531.40x = 128,297.10 × 82,032.20
  4. Step 4: Simplify right side
    85,531.40x = 10,524,493,366.62
  5. Step 5: Solve for x
    x = 10,524,493,366.62/85,531.40
  6. Step 6: Final answer
    x = 123,048.30

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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.