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Finding the Fourth Proportional to 113,763.75, 170,512.76 and 85,593.30

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Solution

The fourth proportional to 113,763.75, 170,512.76 and 85,593.30 is: 128,289.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,763.75 : 170,512.76 = 85,593.30 : x
  2. Step 2: Convert to fraction form
    113,763.75/170,512.76 = 85,593.30/x
  3. Step 3: Cross multiply
    113,763.75x = 170,512.76 × 85,593.30
  4. Step 4: Simplify right side
    113,763.75x = 14,594,749,392.54
  5. Step 5: Solve for x
    x = 14,594,749,392.54/113,763.75
  6. Step 6: Final answer
    x = 128,289.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.