Home / 85,231.40-128,000.70-82,466.60

Finding the Fourth Proportional to 85,231.40, 128,000.70 and 82,466.60

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Solution

The fourth proportional to 85,231.40, 128,000.70 and 82,466.60 is: 123,848.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,231.40 : 128,000.70 = 82,466.60 : x
  2. Step 2: Convert to fraction form
    85,231.40/128,000.70 = 82,466.60/x
  3. Step 3: Cross multiply
    85,231.40x = 128,000.70 × 82,466.60
  4. Step 4: Simplify right side
    85,231.40x = 10,555,782,526.62
  5. Step 5: Solve for x
    x = 10,555,782,526.62/85,231.40
  6. Step 6: Final answer
    x = 123,848.52

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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.