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Finding the Fourth Proportional to 81,744.40, 122,616.60 and 42,313.60

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Solution

The fourth proportional to 81,744.40, 122,616.60 and 42,313.60 is: 63,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,744.40 : 122,616.60 = 42,313.60 : x
  2. Step 2: Convert to fraction form
    81,744.40/122,616.60 = 42,313.60/x
  3. Step 3: Cross multiply
    81,744.40x = 122,616.60 × 42,313.60
  4. Step 4: Simplify right side
    81,744.40x = 5,188,349,765.76
  5. Step 5: Solve for x
    x = 5,188,349,765.76/81,744.40
  6. Step 6: Final answer
    x = 63,470.40

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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.