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Finding the Fourth Proportional to 53,640.40, 80,460.60 and 39,643.60

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Solution

The fourth proportional to 53,640.40, 80,460.60 and 39,643.60 is: 59,465.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,640.40 : 80,460.60 = 39,643.60 : x
  2. Step 2: Convert to fraction form
    53,640.40/80,460.60 = 39,643.60/x
  3. Step 3: Cross multiply
    53,640.40x = 80,460.60 × 39,643.60
  4. Step 4: Simplify right side
    53,640.40x = 3,189,747,842.16
  5. Step 5: Solve for x
    x = 3,189,747,842.16/53,640.40
  6. Step 6: Final answer
    x = 59,465.40

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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.