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Finding the Fourth Proportional to 48,369.79, 72,540.91 and 18,781.30

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Solution

The fourth proportional to 48,369.79, 72,540.91 and 18,781.30 is: 28,166.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,369.79 : 72,540.91 = 18,781.30 : x
  2. Step 2: Convert to fraction form
    48,369.79/72,540.91 = 18,781.30/x
  3. Step 3: Cross multiply
    48,369.79x = 72,540.91 × 18,781.30
  4. Step 4: Simplify right side
    48,369.79x = 1,362,412,592.98
  5. Step 5: Solve for x
    x = 1,362,412,592.98/48,369.79
  6. Step 6: Final answer
    x = 28,166.60

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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.