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Finding the Fourth Proportional to 217,190.80, 325,818.60 and 76,938.40

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Solution

The fourth proportional to 217,190.80, 325,818.60 and 76,938.40 is: 115,419.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,190.80 : 325,818.60 = 76,938.40 : x
  2. Step 2: Convert to fraction form
    217,190.80/325,818.60 = 76,938.40/x
  3. Step 3: Cross multiply
    217,190.80x = 325,818.60 × 76,938.40
  4. Step 4: Simplify right side
    217,190.80x = 25,067,961,774.24
  5. Step 5: Solve for x
    x = 25,067,961,774.24/217,190.80
  6. Step 6: Final answer
    x = 115,419.08

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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.