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Finding the Fourth Proportional to 71,430.66, 107,135.46 and 18,843.84

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Solution

The fourth proportional to 71,430.66, 107,135.46 and 18,843.84 is: 28,262.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,430.66 : 107,135.46 = 18,843.84 : x
  2. Step 2: Convert to fraction form
    71,430.66/107,135.46 = 18,843.84/x
  3. Step 3: Cross multiply
    71,430.66x = 107,135.46 × 18,843.84
  4. Step 4: Simplify right side
    71,430.66x = 2,018,843,466.57
  5. Step 5: Solve for x
    x = 2,018,843,466.57/71,430.66
  6. Step 6: Final answer
    x = 28,262.98

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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.