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Finding the Fourth Proportional to 85,385.85, 117,831.92 and 47,147.77

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Solution

The fourth proportional to 85,385.85, 117,831.92 and 47,147.77 is: 65,063.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,385.85 : 117,831.92 = 47,147.77 : x
  2. Step 2: Convert to fraction form
    85,385.85/117,831.92 = 47,147.77/x
  3. Step 3: Cross multiply
    85,385.85x = 117,831.92 × 47,147.77
  4. Step 4: Simplify right side
    85,385.85x = 5,555,512,174.37
  5. Step 5: Solve for x
    x = 5,555,512,174.37/85,385.85
  6. Step 6: Final answer
    x = 65,063.62

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1.5x scale

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.