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Finding the Fourth Proportional to 53,858.40, 80,791.20 and 18,319.20

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Solution

The fourth proportional to 53,858.40, 80,791.20 and 18,319.20 is: 27,480.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,858.40 : 80,791.20 = 18,319.20 : x
  2. Step 2: Convert to fraction form
    53,858.40/80,791.20 = 18,319.20/x
  3. Step 3: Cross multiply
    53,858.40x = 80,791.20 × 18,319.20
  4. Step 4: Simplify right side
    53,858.40x = 1,480,030,151.04
  5. Step 5: Solve for x
    x = 1,480,030,151.04/53,858.40
  6. Step 6: Final answer
    x = 27,480.02

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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.