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Finding the Fourth Proportional to 71,018.43, 106,568.35 and 28,890.74

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Solution

The fourth proportional to 71,018.43, 106,568.35 and 28,890.74 is: 43,352.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,018.43 : 106,568.35 = 28,890.74 : x
  2. Step 2: Convert to fraction form
    71,018.43/106,568.35 = 28,890.74/x
  3. Step 3: Cross multiply
    71,018.43x = 106,568.35 × 28,890.74
  4. Step 4: Simplify right side
    71,018.43x = 3,078,837,887.01
  5. Step 5: Solve for x
    x = 3,078,837,887.01/71,018.43
  6. Step 6: Final answer
    x = 43,352.66

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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.