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Finding the Fourth Proportional to 118,606, 163,715.16 and 85,169.20

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Solution

The fourth proportional to 118,606, 163,715.16 and 85,169.20 is: 117,561.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,606 : 163,715.16 = 85,169.20 : x
  2. Step 2: Convert to fraction form
    118,606/163,715.16 = 85,169.20/x
  3. Step 3: Cross multiply
    118,606x = 163,715.16 × 85,169.20
  4. Step 4: Simplify right side
    118,606x = 13,943,489,205.07
  5. Step 5: Solve for x
    x = 13,943,489,205.07/118,606
  6. Step 6: Final answer
    x = 117,561.42

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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.