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Finding the Fourth Proportional to 66,378.40, 91,597.92 and 39,522.88

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Solution

The fourth proportional to 66,378.40, 91,597.92 and 39,522.88 is: 54,539.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.40 : 91,597.92 = 39,522.88 : x
  2. Step 2: Convert to fraction form
    66,378.40/91,597.92 = 39,522.88/x
  3. Step 3: Cross multiply
    66,378.40x = 91,597.92 × 39,522.88
  4. Step 4: Simplify right side
    66,378.40x = 3,620,213,600.41
  5. Step 5: Solve for x
    x = 3,620,213,600.41/66,378.40
  6. Step 6: Final answer
    x = 54,539.03

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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.