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Finding the Fourth Proportional to 81,614.34, 112,571.12 and 66,507.03

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Solution

The fourth proportional to 81,614.34, 112,571.12 and 66,507.03 is: 91,733.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,614.34 : 112,571.12 = 66,507.03 : x
  2. Step 2: Convert to fraction form
    81,614.34/112,571.12 = 66,507.03/x
  3. Step 3: Cross multiply
    81,614.34x = 112,571.12 × 66,507.03
  4. Step 4: Simplify right side
    81,614.34x = 7,486,770,522.44
  5. Step 5: Solve for x
    x = 7,486,770,522.44/81,614.34
  6. Step 6: Final answer
    x = 91,733.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.