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Finding the Fourth Proportional to 79,735.20, 119,602.80 and 66,904.80

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Solution

The fourth proportional to 79,735.20, 119,602.80 and 66,904.80 is: 100,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,735.20 : 119,602.80 = 66,904.80 : x
  2. Step 2: Convert to fraction form
    79,735.20/119,602.80 = 66,904.80/x
  3. Step 3: Cross multiply
    79,735.20x = 119,602.80 × 66,904.80
  4. Step 4: Simplify right side
    79,735.20x = 8,002,001,413.44
  5. Step 5: Solve for x
    x = 8,002,001,413.44/79,735.20
  6. Step 6: Final answer
    x = 100,357.20

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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.