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Finding the Fourth Proportional to 117,278,679.60, 175,918,019.40 and 76,464,010.80

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Solution

The fourth proportional to 117,278,679.60, 175,918,019.40 and 76,464,010.80 is: 114,696,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,278,679.60 : 175,918,019.40 = 76,464,010.80 : x
  2. Step 2: Convert to fraction form
    117,278,679.60/175,918,019.40 = 76,464,010.80/x
  3. Step 3: Cross multiply
    117,278,679.60x = 175,918,019.40 × 76,464,010.80
  4. Step 4: Simplify right side
    117,278,679.60x = 13,451,397,335,316,210
  5. Step 5: Solve for x
    x = 13,451,397,335,316,210/117,278,679.60
  6. Step 6: Final answer
    x = 114,696,016.20

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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.