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Finding the Fourth Proportional to 67,898.61, 101,848.68 and 20,514.09

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Solution

The fourth proportional to 67,898.61, 101,848.68 and 20,514.09 is: 30,771.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,898.61 : 101,848.68 = 20,514.09 : x
  2. Step 2: Convert to fraction form
    67,898.61/101,848.68 = 20,514.09/x
  3. Step 3: Cross multiply
    67,898.61x = 101,848.68 × 20,514.09
  4. Step 4: Simplify right side
    67,898.61x = 2,089,332,987.90
  5. Step 5: Solve for x
    x = 2,089,332,987.90/67,898.61
  6. Step 6: Final answer
    x = 30,771.37

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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.