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Finding the Fourth Proportional to 81,487.96, 122,185.86 and 48,212.44

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Solution

The fourth proportional to 81,487.96, 122,185.86 and 48,212.44 is: 72,291.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,487.96 : 122,185.86 = 48,212.44 : x
  2. Step 2: Convert to fraction form
    81,487.96/122,185.86 = 48,212.44/x
  3. Step 3: Cross multiply
    81,487.96x = 122,185.86 × 48,212.44
  4. Step 4: Simplify right side
    81,487.96x = 5,890,878,444.10
  5. Step 5: Solve for x
    x = 5,890,878,444.10/81,487.96
  6. Step 6: Final answer
    x = 72,291.40

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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.