Home / 85,828.40-128,742.60-82,329.20

Finding the Fourth Proportional to 85,828.40, 128,742.60 and 82,329.20

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Solution

The fourth proportional to 85,828.40, 128,742.60 and 82,329.20 is: 123,493.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,828.40 : 128,742.60 = 82,329.20 : x
  2. Step 2: Convert to fraction form
    85,828.40/128,742.60 = 82,329.20/x
  3. Step 3: Cross multiply
    85,828.40x = 128,742.60 × 82,329.20
  4. Step 4: Simplify right side
    85,828.40x = 10,599,275,263.92
  5. Step 5: Solve for x
    x = 10,599,275,263.92/85,828.40
  6. Step 6: Final answer
    x = 123,493.80

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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.