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Finding the Fourth Proportional to 110,413.60, 165,620.40 and 78,920.80

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Solution

The fourth proportional to 110,413.60, 165,620.40 and 78,920.80 is: 118,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,413.60 : 165,620.40 = 78,920.80 : x
  2. Step 2: Convert to fraction form
    110,413.60/165,620.40 = 78,920.80/x
  3. Step 3: Cross multiply
    110,413.60x = 165,620.40 × 78,920.80
  4. Step 4: Simplify right side
    110,413.60x = 13,070,894,464.32
  5. Step 5: Solve for x
    x = 13,070,894,464.32/110,413.60
  6. Step 6: Final answer
    x = 118,381.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.