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Finding the Fourth Proportional to 76,781.73, 105,910.29 and 52,866.87

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Solution

The fourth proportional to 76,781.73, 105,910.29 and 52,866.87 is: 72,922.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,781.73 : 105,910.29 = 52,866.87 : x
  2. Step 2: Convert to fraction form
    76,781.73/105,910.29 = 52,866.87/x
  3. Step 3: Cross multiply
    76,781.73x = 105,910.29 × 52,866.87
  4. Step 4: Simplify right side
    76,781.73x = 5,599,145,533.09
  5. Step 5: Solve for x
    x = 5,599,145,533.09/76,781.73
  6. Step 6: Final answer
    x = 72,922.89

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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.