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Finding the Fourth Proportional to 81,645.39, 122,505.75 and 37,285.74

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Solution

The fourth proportional to 81,645.39, 122,505.75 and 37,285.74 is: 55,945.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,645.39 : 122,505.75 = 37,285.74 : x
  2. Step 2: Convert to fraction form
    81,645.39/122,505.75 = 37,285.74/x
  3. Step 3: Cross multiply
    81,645.39x = 122,505.75 × 37,285.74
  4. Step 4: Simplify right side
    81,645.39x = 4,567,717,543.01
  5. Step 5: Solve for x
    x = 4,567,717,543.01/81,645.39
  6. Step 6: Final answer
    x = 55,945.81

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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.