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Finding the Fourth Proportional to 53,870.30, 80,781.99 and 18,321.99

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Solution

The fourth proportional to 53,870.30, 80,781.99 and 18,321.99 is: 27,475.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,870.30 : 80,781.99 = 18,321.99 : x
  2. Step 2: Convert to fraction form
    53,870.30/80,781.99 = 18,321.99/x
  3. Step 3: Cross multiply
    53,870.30x = 80,781.99 × 18,321.99
  4. Step 4: Simplify right side
    53,870.30x = 1,480,086,812.96
  5. Step 5: Solve for x
    x = 1,480,086,812.96/53,870.30
  6. Step 6: Final answer
    x = 27,475.01

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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.