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Finding the Fourth Proportional to 76,661.75, 105,793.28 and 43,127.75

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Solution

The fourth proportional to 76,661.75, 105,793.28 and 43,127.75 is: 59,516.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,661.75 : 105,793.28 = 43,127.75 : x
  2. Step 2: Convert to fraction form
    76,661.75/105,793.28 = 43,127.75/x
  3. Step 3: Cross multiply
    76,661.75x = 105,793.28 × 43,127.75
  4. Step 4: Simplify right side
    76,661.75x = 4,562,626,131.52
  5. Step 5: Solve for x
    x = 4,562,626,131.52/76,661.75
  6. Step 6: Final answer
    x = 59,516.33

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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.