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Finding the Fourth Proportional to 53,762.40, 80,643.60 and 40,640.40

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Solution

The fourth proportional to 53,762.40, 80,643.60 and 40,640.40 is: 60,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,762.40 : 80,643.60 = 40,640.40 : x
  2. Step 2: Convert to fraction form
    53,762.40/80,643.60 = 40,640.40/x
  3. Step 3: Cross multiply
    53,762.40x = 80,643.60 × 40,640.40
  4. Step 4: Simplify right side
    53,762.40x = 3,277,388,161.44
  5. Step 5: Solve for x
    x = 3,277,388,161.44/53,762.40
  6. Step 6: Final answer
    x = 60,960.60

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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.