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Finding the Fourth Proportional to 81,736.40, 122,604.60 and 42,305.60

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Solution

The fourth proportional to 81,736.40, 122,604.60 and 42,305.60 is: 63,458.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,736.40 : 122,604.60 = 42,305.60 : x
  2. Step 2: Convert to fraction form
    81,736.40/122,604.60 = 42,305.60/x
  3. Step 3: Cross multiply
    81,736.40x = 122,604.60 × 42,305.60
  4. Step 4: Simplify right side
    81,736.40x = 5,186,861,165.76
  5. Step 5: Solve for x
    x = 5,186,861,165.76/81,736.40
  6. Step 6: Final answer
    x = 63,458.40

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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.