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Finding the Fourth Proportional to 60,643.70, 90,969.60 and 20,662.10

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Solution

The fourth proportional to 60,643.70, 90,969.60 and 20,662.10 is: 30,994.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,643.70 : 90,969.60 = 20,662.10 : x
  2. Step 2: Convert to fraction form
    60,643.70/90,969.60 = 20,662.10/x
  3. Step 3: Cross multiply
    60,643.70x = 90,969.60 × 20,662.10
  4. Step 4: Simplify right side
    60,643.70x = 1,879,622,972.16
  5. Step 5: Solve for x
    x = 1,879,622,972.16/60,643.70
  6. Step 6: Final answer
    x = 30,994.53

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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.