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Finding the Fourth Proportional to 301,173,978.20, 451,751,636.10 and 85,763,226.20

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Solution

The fourth proportional to 301,173,978.20, 451,751,636.10 and 85,763,226.20 is: 128,642,182.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    301,173,978.20 : 451,751,636.10 = 85,763,226.20 : x
  2. Step 2: Convert to fraction form
    301,173,978.20/451,751,636.10 = 85,763,226.20/x
  3. Step 3: Cross multiply
    301,173,978.20x = 451,751,636.10 × 85,763,226.20
  4. Step 4: Simplify right side
    301,173,978.20x = 38,743,677,753,064,392
  5. Step 5: Solve for x
    x = 38,743,677,753,064,392/301,173,978.20
  6. Step 6: Final answer
    x = 128,642,182.12

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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.