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Finding the Fourth Proportional to 84,428.32, 126,069.32 and 75,563.68

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Solution

The fourth proportional to 84,428.32, 126,069.32 and 75,563.68 is: 112,832.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,428.32 : 126,069.32 = 75,563.68 : x
  2. Step 2: Convert to fraction form
    84,428.32/126,069.32 = 75,563.68/x
  3. Step 3: Cross multiply
    84,428.32x = 126,069.32 × 75,563.68
  4. Step 4: Simplify right side
    84,428.32x = 9,526,261,754.30
  5. Step 5: Solve for x
    x = 9,526,261,754.30/84,428.32
  6. Step 6: Final answer
    x = 112,832.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.