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Finding the Fourth Proportional to 191,505,318.90, 287,257,978.35 and 133,054,682.10

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Solution

The fourth proportional to 191,505,318.90, 287,257,978.35 and 133,054,682.10 is: 199,582,023.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,505,318.90 : 287,257,978.35 = 133,054,682.10 : x
  2. Step 2: Convert to fraction form
    191,505,318.90/287,257,978.35 = 133,054,682.10/x
  3. Step 3: Cross multiply
    191,505,318.90x = 287,257,978.35 × 133,054,682.10
  4. Step 4: Simplify right side
    191,505,318.90x = 38,221,018,990,047,936
  5. Step 5: Solve for x
    x = 38,221,018,990,047,936/191,505,318.90
  6. Step 6: Final answer
    x = 199,582,023.15

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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.