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Finding the Fourth Proportional to 85,395.45, 117,855.71 and 71,029.94

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Solution

The fourth proportional to 85,395.45, 117,855.71 and 71,029.94 is: 98,029.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,395.45 : 117,855.71 = 71,029.94 : x
  2. Step 2: Convert to fraction form
    85,395.45/117,855.71 = 71,029.94/x
  3. Step 3: Cross multiply
    85,395.45x = 117,855.71 × 71,029.94
  4. Step 4: Simplify right side
    85,395.45x = 8,371,284,009.96
  5. Step 5: Solve for x
    x = 8,371,284,009.96/85,395.45
  6. Step 6: Final answer
    x = 98,029.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.