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Finding the Fourth Proportional to 53,999.40, 81,023.40 and 18,964.20

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Solution

The fourth proportional to 53,999.40, 81,023.40 and 18,964.20 is: 28,454.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,999.40 : 81,023.40 = 18,964.20 : x
  2. Step 2: Convert to fraction form
    53,999.40/81,023.40 = 18,964.20/x
  3. Step 3: Cross multiply
    53,999.40x = 81,023.40 × 18,964.20
  4. Step 4: Simplify right side
    53,999.40x = 1,536,543,962.28
  5. Step 5: Solve for x
    x = 1,536,543,962.28/53,999.40
  6. Step 6: Final answer
    x = 28,454.83

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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.