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Finding the Fourth Proportional to 118,583.60, 163,713.08 and 78,413.87

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Solution

The fourth proportional to 118,583.60, 163,713.08 and 78,413.87 is: 108,255.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,583.60 : 163,713.08 = 78,413.87 : x
  2. Step 2: Convert to fraction form
    118,583.60/163,713.08 = 78,413.87/x
  3. Step 3: Cross multiply
    118,583.60x = 163,713.08 × 78,413.87
  4. Step 4: Simplify right side
    118,583.60x = 12,837,376,777.74
  5. Step 5: Solve for x
    x = 12,837,376,777.74/118,583.60
  6. Step 6: Final answer
    x = 108,255.93

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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.