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Finding the Fourth Proportional to 118,643.69, 163,804.71 and 105,874.92

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Solution

The fourth proportional to 118,643.69, 163,804.71 and 105,874.92 is: 146,175.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,643.69 : 163,804.71 = 105,874.92 : x
  2. Step 2: Convert to fraction form
    118,643.69/163,804.71 = 105,874.92/x
  3. Step 3: Cross multiply
    118,643.69x = 163,804.71 × 105,874.92
  4. Step 4: Simplify right side
    118,643.69x = 17,342,809,747.85
  5. Step 5: Solve for x
    x = 17,342,809,747.85/118,643.69
  6. Step 6: Final answer
    x = 146,175.58

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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.