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Finding the Fourth Proportional to 66,661.46, 92,015.98 and 38,378.42

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Solution

The fourth proportional to 66,661.46, 92,015.98 and 38,378.42 is: 52,975.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661.46 : 92,015.98 = 38,378.42 : x
  2. Step 2: Convert to fraction form
    66,661.46/92,015.98 = 38,378.42/x
  3. Step 3: Cross multiply
    66,661.46x = 92,015.98 × 38,378.42
  4. Step 4: Simplify right side
    66,661.46x = 3,531,427,927.15
  5. Step 5: Solve for x
    x = 3,531,427,927.15/66,661.46
  6. Step 6: Final answer
    x = 52,975.56

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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.