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Finding the Fourth Proportional to 117,879.72, 176,821.40 and 65,621.35

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Solution

The fourth proportional to 117,879.72, 176,821.40 and 65,621.35 is: 98,433.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,879.72 : 176,821.40 = 65,621.35 : x
  2. Step 2: Convert to fraction form
    117,879.72/176,821.40 = 65,621.35/x
  3. Step 3: Cross multiply
    117,879.72x = 176,821.40 × 65,621.35
  4. Step 4: Simplify right side
    117,879.72x = 11,603,258,976.89
  5. Step 5: Solve for x
    x = 11,603,258,976.89/117,879.72
  6. Step 6: Final answer
    x = 98,433.04

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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.