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Finding the Fourth Proportional to 81,290,303,998.40, 121,935,455,997.60 and 81,290,303,998.40

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Solution

The fourth proportional to 81,290,303,998.40, 121,935,455,997.60 and 81,290,303,998.40 is: 121,935,455,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290,303,998.40 : 121,935,455,997.60 = 81,290,303,998.40 : x
  2. Step 2: Convert to fraction form
    81,290,303,998.40/121,935,455,997.60 = 81,290,303,998.40/x
  3. Step 3: Cross multiply
    81,290,303,998.40x = 121,935,455,997.60 × 81,290,303,998.40
  4. Step 4: Simplify right side
    81,290,303,998.40x = 9,912,170,286,228,430,651,392
  5. Step 5: Solve for x
    x = 9,912,170,286,228,430,651,392/81,290,303,998.40
  6. Step 6: Final answer
    x = 121,935,455,997.60

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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.