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Finding the Fourth Proportional to 81,389.64, 122,086.08 and 53,487.57

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Solution

The fourth proportional to 81,389.64, 122,086.08 and 53,487.57 is: 80,232.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389.64 : 122,086.08 = 53,487.57 : x
  2. Step 2: Convert to fraction form
    81,389.64/122,086.08 = 53,487.57/x
  3. Step 3: Cross multiply
    81,389.64x = 122,086.08 × 53,487.57
  4. Step 4: Simplify right side
    81,389.64x = 6,530,087,750.03
  5. Step 5: Solve for x
    x = 6,530,087,750.03/81,389.64
  6. Step 6: Final answer
    x = 80,232.42

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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.