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Finding the Fourth Proportional to 115,792.96, 159,791.52 and 64,806.40

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Solution

The fourth proportional to 115,792.96, 159,791.52 and 64,806.40 is: 89,431.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,792.96 : 159,791.52 = 64,806.40 : x
  2. Step 2: Convert to fraction form
    115,792.96/159,791.52 = 64,806.40/x
  3. Step 3: Cross multiply
    115,792.96x = 159,791.52 × 64,806.40
  4. Step 4: Simplify right side
    115,792.96x = 10,355,513,161.73
  5. Step 5: Solve for x
    x = 10,355,513,161.73/115,792.96
  6. Step 6: Final answer
    x = 89,431.28

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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.