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Finding the Fourth Proportional to 213,019,621.20, 319,529,431.80 and 83,560,593.60

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Solution

The fourth proportional to 213,019,621.20, 319,529,431.80 and 83,560,593.60 is: 125,340,890.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,019,621.20 : 319,529,431.80 = 83,560,593.60 : x
  2. Step 2: Convert to fraction form
    213,019,621.20/319,529,431.80 = 83,560,593.60/x
  3. Step 3: Cross multiply
    213,019,621.20x = 319,529,431.80 × 83,560,593.60
  4. Step 4: Simplify right side
    213,019,621.20x = 26,700,068,993,878,716
  5. Step 5: Solve for x
    x = 26,700,068,993,878,716/213,019,621.20
  6. Step 6: Final answer
    x = 125,340,890.40

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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.