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Finding the Fourth Proportional to 53,881.98, 80,859.93 and 18,821.64

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Solution

The fourth proportional to 53,881.98, 80,859.93 and 18,821.64 is: 28,245.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,881.98 : 80,859.93 = 18,821.64 : x
  2. Step 2: Convert to fraction form
    53,881.98/80,859.93 = 18,821.64/x
  3. Step 3: Cross multiply
    53,881.98x = 80,859.93 × 18,821.64
  4. Step 4: Simplify right side
    53,881.98x = 1,521,916,492.89
  5. Step 5: Solve for x
    x = 1,521,916,492.89/53,881.98
  6. Step 6: Final answer
    x = 28,245.37

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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.