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Finding the Fourth Proportional to 118,779.50, 163,918.35 and 67,791.21

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Solution

The fourth proportional to 118,779.50, 163,918.35 and 67,791.21 is: 93,553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,779.50 : 163,918.35 = 67,791.21 : x
  2. Step 2: Convert to fraction form
    118,779.50/163,918.35 = 67,791.21/x
  3. Step 3: Cross multiply
    118,779.50x = 163,918.35 × 67,791.21
  4. Step 4: Simplify right side
    118,779.50x = 11,112,223,287.70
  5. Step 5: Solve for x
    x = 11,112,223,287.70/118,779.50
  6. Step 6: Final answer
    x = 93,553.38

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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.