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Finding the Fourth Proportional to 201,961,784.08, 278,719,752 and 111,434,832.31

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Solution

The fourth proportional to 201,961,784.08, 278,719,752 and 111,434,832.31 is: 153,786,960.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,961,784.08 : 278,719,752 = 111,434,832.31 : x
  2. Step 2: Convert to fraction form
    201,961,784.08/278,719,752 = 111,434,832.31/x
  3. Step 3: Cross multiply
    201,961,784.08x = 278,719,752 × 111,434,832.31
  4. Step 4: Simplify right side
    201,961,784.08x = 31,059,088,825,604,788
  5. Step 5: Solve for x
    x = 31,059,088,825,604,788/201,961,784.08
  6. Step 6: Final answer
    x = 153,786,960.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.