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Finding the Fourth Proportional to 85,105.85, 117,435.87 and 49,290.89

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Solution

The fourth proportional to 85,105.85, 117,435.87 and 49,290.89 is: 68,015.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,105.85 : 117,435.87 = 49,290.89 : x
  2. Step 2: Convert to fraction form
    85,105.85/117,435.87 = 49,290.89/x
  3. Step 3: Cross multiply
    85,105.85x = 117,435.87 × 49,290.89
  4. Step 4: Simplify right side
    85,105.85x = 5,788,518,550.22
  5. Step 5: Solve for x
    x = 5,788,518,550.22/85,105.85
  6. Step 6: Final answer
    x = 68,015.52

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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.