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Finding the Fourth Proportional to 66,380.94, 99,571.42 and 38,659.50

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Solution

The fourth proportional to 66,380.94, 99,571.42 and 38,659.50 is: 57,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,380.94 : 99,571.42 = 38,659.50 : x
  2. Step 2: Convert to fraction form
    66,380.94/99,571.42 = 38,659.50/x
  3. Step 3: Cross multiply
    66,380.94x = 99,571.42 × 38,659.50
  4. Step 4: Simplify right side
    66,380.94x = 3,849,381,311.49
  5. Step 5: Solve for x
    x = 3,849,381,311.49/66,380.94
  6. Step 6: Final answer
    x = 57,989.26

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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.