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Finding the Fourth Proportional to 70,534,727.60, 105,795,870.60 and 19,412,193.20

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Solution

The fourth proportional to 70,534,727.60, 105,795,870.60 and 19,412,193.20 is: 29,116,577.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,534,727.60 : 105,795,870.60 = 19,412,193.20 : x
  2. Step 2: Convert to fraction form
    70,534,727.60/105,795,870.60 = 19,412,193.20/x
  3. Step 3: Cross multiply
    70,534,727.60x = 105,795,870.60 × 19,412,193.20
  4. Step 4: Simplify right side
    70,534,727.60x = 2,053,729,879,849,399.75
  5. Step 5: Solve for x
    x = 2,053,729,879,849,399.75/70,534,727.60
  6. Step 6: Final answer
    x = 29,116,577.74

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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.