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Finding the Fourth Proportional to 53,156, 79,783.20 and 26,879.20

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Solution

The fourth proportional to 53,156, 79,783.20 and 26,879.20 is: 40,343.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,156 : 79,783.20 = 26,879.20 : x
  2. Step 2: Convert to fraction form
    53,156/79,783.20 = 26,879.20/x
  3. Step 3: Cross multiply
    53,156x = 79,783.20 × 26,879.20
  4. Step 4: Simplify right side
    53,156x = 2,144,508,589.44
  5. Step 5: Solve for x
    x = 2,144,508,589.44/53,156
  6. Step 6: Final answer
    x = 40,343.68

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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.