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Finding the Fourth Proportional to 265,636.83, 398,513.66 and 78,662.91

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Solution

The fourth proportional to 265,636.83, 398,513.66 and 78,662.91 is: 118,011.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,636.83 : 398,513.66 = 78,662.91 : x
  2. Step 2: Convert to fraction form
    265,636.83/398,513.66 = 78,662.91/x
  3. Step 3: Cross multiply
    265,636.83x = 398,513.66 × 78,662.91
  4. Step 4: Simplify right side
    265,636.83x = 31,348,244,170.35
  5. Step 5: Solve for x
    x = 31,348,244,170.35/265,636.83
  6. Step 6: Final answer
    x = 118,011.66

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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.