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Finding the Fourth Proportional to 76,659.78, 105,790.46 and 43,125.78

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Solution

The fourth proportional to 76,659.78, 105,790.46 and 43,125.78 is: 59,513.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,659.78 : 105,790.46 = 43,125.78 : x
  2. Step 2: Convert to fraction form
    76,659.78/105,790.46 = 43,125.78/x
  3. Step 3: Cross multiply
    76,659.78x = 105,790.46 × 43,125.78
  4. Step 4: Simplify right side
    76,659.78x = 4,562,296,104.06
  5. Step 5: Solve for x
    x = 4,562,296,104.06/76,659.78
  6. Step 6: Final answer
    x = 59,513.56

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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.