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Finding the Fourth Proportional to 66,680.88, 92,002.41 and 39,811.56

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Solution

The fourth proportional to 66,680.88, 92,002.41 and 39,811.56 is: 54,929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,680.88 : 92,002.41 = 39,811.56 : x
  2. Step 2: Convert to fraction form
    66,680.88/92,002.41 = 39,811.56/x
  3. Step 3: Cross multiply
    66,680.88x = 92,002.41 × 39,811.56
  4. Step 4: Simplify right side
    66,680.88x = 3,662,759,465.86
  5. Step 5: Solve for x
    x = 3,662,759,465.86/66,680.88
  6. Step 6: Final answer
    x = 54,929.68

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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.