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Finding the Fourth Proportional to 115,874.72, 159,893.90 and 64,880.36

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Solution

The fourth proportional to 115,874.72, 159,893.90 and 64,880.36 is: 89,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,874.72 : 159,893.90 = 64,880.36 : x
  2. Step 2: Convert to fraction form
    115,874.72/159,893.90 = 64,880.36/x
  3. Step 3: Cross multiply
    115,874.72x = 159,893.90 × 64,880.36
  4. Step 4: Simplify right side
    115,874.72x = 10,373,973,469.40
  5. Step 5: Solve for x
    x = 10,373,973,469.40/115,874.72
  6. Step 6: Final answer
    x = 89,527.50

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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.