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Finding the Fourth Proportional to 118,668.78, 163,766.88 and 67,689

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Solution

The fourth proportional to 118,668.78, 163,766.88 and 67,689 is: 93,413.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,668.78 : 163,766.88 = 67,689 : x
  2. Step 2: Convert to fraction form
    118,668.78/163,766.88 = 67,689/x
  3. Step 3: Cross multiply
    118,668.78x = 163,766.88 × 67,689
  4. Step 4: Simplify right side
    118,668.78x = 11,085,216,340.32
  5. Step 5: Solve for x
    x = 11,085,216,340.32/118,668.78
  6. Step 6: Final answer
    x = 93,413.08

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1.5x scale

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.