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Finding the Fourth Proportional to 85,383.20, 127,911.60 and 45,927.20

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Solution

The fourth proportional to 85,383.20, 127,911.60 and 45,927.20 is: 68,803.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,383.20 : 127,911.60 = 45,927.20 : x
  2. Step 2: Convert to fraction form
    85,383.20/127,911.60 = 45,927.20/x
  3. Step 3: Cross multiply
    85,383.20x = 127,911.60 × 45,927.20
  4. Step 4: Simplify right side
    85,383.20x = 5,874,621,635.52
  5. Step 5: Solve for x
    x = 5,874,621,635.52/85,383.20
  6. Step 6: Final answer
    x = 68,803.02

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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.