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Finding the Fourth Proportional to 92,786.50, 128,078.58 and 55,060.75

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Solution

The fourth proportional to 92,786.50, 128,078.58 and 55,060.75 is: 76,003.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,786.50 : 128,078.58 = 55,060.75 : x
  2. Step 2: Convert to fraction form
    92,786.50/128,078.58 = 55,060.75/x
  3. Step 3: Cross multiply
    92,786.50x = 128,078.58 × 55,060.75
  4. Step 4: Simplify right side
    92,786.50x = 7,052,102,673.74
  5. Step 5: Solve for x
    x = 7,052,102,673.74/92,786.50
  6. Step 6: Final answer
    x = 76,003.54

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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.