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Finding the Fourth Proportional to 66,188.59, 91,333.28 and 39,327.44

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Solution

The fourth proportional to 66,188.59, 91,333.28 and 39,327.44 is: 54,267.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,188.59 : 91,333.28 = 39,327.44 : x
  2. Step 2: Convert to fraction form
    66,188.59/91,333.28 = 39,327.44/x
  3. Step 3: Cross multiply
    66,188.59x = 91,333.28 × 39,327.44
  4. Step 4: Simplify right side
    66,188.59x = 3,591,903,730.86
  5. Step 5: Solve for x
    x = 3,591,903,730.86/66,188.59
  6. Step 6: Final answer
    x = 54,267.72

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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.