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Finding the Fourth Proportional to 122,413.40, 168,933.56 and 68,702.70

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Solution

The fourth proportional to 122,413.40, 168,933.56 and 68,702.70 is: 94,811.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,413.40 : 168,933.56 = 68,702.70 : x
  2. Step 2: Convert to fraction form
    122,413.40/168,933.56 = 68,702.70/x
  3. Step 3: Cross multiply
    122,413.40x = 168,933.56 × 68,702.70
  4. Step 4: Simplify right side
    122,413.40x = 11,606,191,349.10
  5. Step 5: Solve for x
    x = 11,606,191,349.10/122,413.40
  6. Step 6: Final answer
    x = 94,811.45

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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.