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Finding the Fourth Proportional to 85,420.82, 117,880.94 and 47,696.42

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Solution

The fourth proportional to 85,420.82, 117,880.94 and 47,696.42 is: 65,821.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,420.82 : 117,880.94 = 47,696.42 : x
  2. Step 2: Convert to fraction form
    85,420.82/117,880.94 = 47,696.42/x
  3. Step 3: Cross multiply
    85,420.82x = 117,880.94 × 47,696.42
  4. Step 4: Simplify right side
    85,420.82x = 5,622,498,354.07
  5. Step 5: Solve for x
    x = 5,622,498,354.07/85,420.82
  6. Step 6: Final answer
    x = 65,821.17

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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.