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Finding the Fourth Proportional to 118,969.13, 164,206.13 and 80,792.40

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Solution

The fourth proportional to 118,969.13, 164,206.13 and 80,792.40 is: 111,513.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,969.13 : 164,206.13 = 80,792.40 : x
  2. Step 2: Convert to fraction form
    118,969.13/164,206.13 = 80,792.40/x
  3. Step 3: Cross multiply
    118,969.13x = 164,206.13 × 80,792.40
  4. Step 4: Simplify right side
    118,969.13x = 13,266,606,933.45
  5. Step 5: Solve for x
    x = 13,266,606,933.45/118,969.13
  6. Step 6: Final answer
    x = 111,513.02

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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.