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Finding the Fourth Proportional to 70,087.29, 96,717.09 and 39,869.78

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Solution

The fourth proportional to 70,087.29, 96,717.09 and 39,869.78 is: 55,018.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,087.29 : 96,717.09 = 39,869.78 : x
  2. Step 2: Convert to fraction form
    70,087.29/96,717.09 = 39,869.78/x
  3. Step 3: Cross multiply
    70,087.29x = 96,717.09 × 39,869.78
  4. Step 4: Simplify right side
    70,087.29x = 3,856,089,100.54
  5. Step 5: Solve for x
    x = 3,856,089,100.54/70,087.29
  6. Step 6: Final answer
    x = 55,018.38

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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.