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Finding the Fourth Proportional to 81,372.96, 121,845.84 and 65,493.60

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Solution

The fourth proportional to 81,372.96, 121,845.84 and 65,493.60 is: 98,068.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,372.96 : 121,845.84 = 65,493.60 : x
  2. Step 2: Convert to fraction form
    81,372.96/121,845.84 = 65,493.60/x
  3. Step 3: Cross multiply
    81,372.96x = 121,845.84 × 65,493.60
  4. Step 4: Simplify right side
    81,372.96x = 7,980,122,706.62
  5. Step 5: Solve for x
    x = 7,980,122,706.62/81,372.96
  6. Step 6: Final answer
    x = 98,068.48

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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.