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Finding the Fourth Proportional to 115,838.55, 159,845.49 and 64,847.97

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Solution

The fourth proportional to 115,838.55, 159,845.49 and 64,847.97 is: 89,483.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,838.55 : 159,845.49 = 64,847.97 : x
  2. Step 2: Convert to fraction form
    115,838.55/159,845.49 = 64,847.97/x
  3. Step 3: Cross multiply
    115,838.55x = 159,845.49 × 64,847.97
  4. Step 4: Simplify right side
    115,838.55x = 10,365,655,540.16
  5. Step 5: Solve for x
    x = 10,365,655,540.16/115,838.55
  6. Step 6: Final answer
    x = 89,483.64

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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.