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Finding the Fourth Proportional to 70,087.48, 96,717.65 and 39,869.21

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Solution

The fourth proportional to 70,087.48, 96,717.65 and 39,869.21 is: 55,017.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,087.48 : 96,717.65 = 39,869.21 : x
  2. Step 2: Convert to fraction form
    70,087.48/96,717.65 = 39,869.21/x
  3. Step 3: Cross multiply
    70,087.48x = 96,717.65 × 39,869.21
  4. Step 4: Simplify right side
    70,087.48x = 3,856,056,341.00
  5. Step 5: Solve for x
    x = 3,856,056,341.00/70,087.48
  6. Step 6: Final answer
    x = 55,017.76

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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.