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Finding the Fourth Proportional to 265,853.91, 398,778.83 and 66,172.95

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Solution

The fourth proportional to 265,853.91, 398,778.83 and 66,172.95 is: 99,258.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,853.91 : 398,778.83 = 66,172.95 : x
  2. Step 2: Convert to fraction form
    265,853.91/398,778.83 = 66,172.95/x
  3. Step 3: Cross multiply
    265,853.91x = 398,778.83 × 66,172.95
  4. Step 4: Simplify right side
    265,853.91x = 26,388,371,495.93
  5. Step 5: Solve for x
    x = 26,388,371,495.93/265,853.91
  6. Step 6: Final answer
    x = 99,258.92

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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.