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Finding the Fourth Proportional to 118,916.75, 164,105.12 and 68,615.75

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Solution

The fourth proportional to 118,916.75, 164,105.12 and 68,615.75 is: 94,689.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,916.75 : 164,105.12 = 68,615.75 : x
  2. Step 2: Convert to fraction form
    118,916.75/164,105.12 = 68,615.75/x
  3. Step 3: Cross multiply
    118,916.75x = 164,105.12 × 68,615.75
  4. Step 4: Simplify right side
    118,916.75x = 11,260,195,887.64
  5. Step 5: Solve for x
    x = 11,260,195,887.64/118,916.75
  6. Step 6: Final answer
    x = 94,689.74

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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.