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Finding the Fourth Proportional to 53,809.20, 80,713.80 and 38,948.40

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Solution

The fourth proportional to 53,809.20, 80,713.80 and 38,948.40 is: 58,422.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,809.20 : 80,713.80 = 38,948.40 : x
  2. Step 2: Convert to fraction form
    53,809.20/80,713.80 = 38,948.40/x
  3. Step 3: Cross multiply
    53,809.20x = 80,713.80 × 38,948.40
  4. Step 4: Simplify right side
    53,809.20x = 3,143,673,367.92
  5. Step 5: Solve for x
    x = 3,143,673,367.92/53,809.20
  6. Step 6: Final answer
    x = 58,422.60

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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.