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Finding the Fourth Proportional to 70,127,997.60, 105,191,996.40 and 19,009,934.40

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Solution

The fourth proportional to 70,127,997.60, 105,191,996.40 and 19,009,934.40 is: 28,514,901.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,127,997.60 : 105,191,996.40 = 19,009,934.40 : x
  2. Step 2: Convert to fraction form
    70,127,997.60/105,191,996.40 = 19,009,934.40/x
  3. Step 3: Cross multiply
    70,127,997.60x = 105,191,996.40 × 19,009,934.40
  4. Step 4: Simplify right side
    70,127,997.60x = 1,999,692,950,969,036
  5. Step 5: Solve for x
    x = 1,999,692,950,969,036/70,127,997.60
  6. Step 6: Final answer
    x = 28,514,901.60

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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.