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Finding the Fourth Proportional to 53,699.60, 80,470.20 and 38,939.60

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Solution

The fourth proportional to 53,699.60, 80,470.20 and 38,939.60 is: 58,351.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,699.60 : 80,470.20 = 38,939.60 : x
  2. Step 2: Convert to fraction form
    53,699.60/80,470.20 = 38,939.60/x
  3. Step 3: Cross multiply
    53,699.60x = 80,470.20 × 38,939.60
  4. Step 4: Simplify right side
    53,699.60x = 3,133,477,399.92
  5. Step 5: Solve for x
    x = 3,133,477,399.92/53,699.60
  6. Step 6: Final answer
    x = 58,351.97

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1.5x scale

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.