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Finding the Fourth Proportional to 43,608.40, 65,412.60 and 28,736.80

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Solution

The fourth proportional to 43,608.40, 65,412.60 and 28,736.80 is: 43,105.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,608.40 : 65,412.60 = 28,736.80 : x
  2. Step 2: Convert to fraction form
    43,608.40/65,412.60 = 28,736.80/x
  3. Step 3: Cross multiply
    43,608.40x = 65,412.60 × 28,736.80
  4. Step 4: Simplify right side
    43,608.40x = 1,879,748,803.68
  5. Step 5: Solve for x
    x = 1,879,748,803.68/43,608.40
  6. Step 6: Final answer
    x = 43,105.20

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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.