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Finding the Fourth Proportional to 87,969.92, 121,398.64 and 47,683.68

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Solution

The fourth proportional to 87,969.92, 121,398.64 and 47,683.68 is: 65,803.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,969.92 : 121,398.64 = 47,683.68 : x
  2. Step 2: Convert to fraction form
    87,969.92/121,398.64 = 47,683.68/x
  3. Step 3: Cross multiply
    87,969.92x = 121,398.64 × 47,683.68
  4. Step 4: Simplify right side
    87,969.92x = 5,788,733,902.20
  5. Step 5: Solve for x
    x = 5,788,733,902.20/87,969.92
  6. Step 6: Final answer
    x = 65,803.56

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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.