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Finding the Fourth Proportional to 217,165.60, 325,633.20 and 76,928.80

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Solution

The fourth proportional to 217,165.60, 325,633.20 and 76,928.80 is: 115,352.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,165.60 : 325,633.20 = 76,928.80 : x
  2. Step 2: Convert to fraction form
    217,165.60/325,633.20 = 76,928.80/x
  3. Step 3: Cross multiply
    217,165.60x = 325,633.20 × 76,928.80
  4. Step 4: Simplify right side
    217,165.60x = 25,050,571,316.16
  5. Step 5: Solve for x
    x = 25,050,571,316.16/217,165.60
  6. Step 6: Final answer
    x = 115,352.39

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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.