Home / 92,285,998.20-138,428,997.30-77,281,428.60

Finding the Fourth Proportional to 92,285,998.20, 138,428,997.30 and 77,281,428.60

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Solution

The fourth proportional to 92,285,998.20, 138,428,997.30 and 77,281,428.60 is: 115,922,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,285,998.20 : 138,428,997.30 = 77,281,428.60 : x
  2. Step 2: Convert to fraction form
    92,285,998.20/138,428,997.30 = 77,281,428.60/x
  3. Step 3: Cross multiply
    92,285,998.20x = 138,428,997.30 × 77,281,428.60
  4. Step 4: Simplify right side
    92,285,998.20x = 10,697,990,671,009,542
  5. Step 5: Solve for x
    x = 10,697,990,671,009,542/92,285,998.20
  6. Step 6: Final answer
    x = 115,922,142.90

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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.