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Finding the Fourth Proportional to 141,751.20, 212,626.80 and 79,413.60

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Solution

The fourth proportional to 141,751.20, 212,626.80 and 79,413.60 is: 119,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,751.20 : 212,626.80 = 79,413.60 : x
  2. Step 2: Convert to fraction form
    141,751.20/212,626.80 = 79,413.60/x
  3. Step 3: Cross multiply
    141,751.20x = 212,626.80 × 79,413.60
  4. Step 4: Simplify right side
    141,751.20x = 16,885,459,644.48
  5. Step 5: Solve for x
    x = 16,885,459,644.48/141,751.20
  6. Step 6: Final answer
    x = 119,120.40

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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.