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Finding the Fourth Proportional to 76,998.40, 115,497.60 and 43,705.60

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Solution

The fourth proportional to 76,998.40, 115,497.60 and 43,705.60 is: 65,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,998.40 : 115,497.60 = 43,705.60 : x
  2. Step 2: Convert to fraction form
    76,998.40/115,497.60 = 43,705.60/x
  3. Step 3: Cross multiply
    76,998.40x = 115,497.60 × 43,705.60
  4. Step 4: Simplify right side
    76,998.40x = 5,047,891,906.56
  5. Step 5: Solve for x
    x = 5,047,891,906.56/76,998.40
  6. Step 6: Final answer
    x = 65,558.40

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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.