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Finding the Fourth Proportional to 186,787,205.60, 279,802,894.80 and 129,344,338.40

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Solution

The fourth proportional to 186,787,205.60, 279,802,894.80 and 129,344,338.40 is: 193,754,814.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,787,205.60 : 279,802,894.80 = 129,344,338.40 : x
  2. Step 2: Convert to fraction form
    186,787,205.60/279,802,894.80 = 129,344,338.40/x
  3. Step 3: Cross multiply
    186,787,205.60x = 279,802,894.80 × 129,344,338.40
  4. Step 4: Simplify right side
    186,787,205.60x = 36,190,920,310,310,800
  5. Step 5: Solve for x
    x = 36,190,920,310,310,800/186,787,205.60
  6. Step 6: Final answer
    x = 193,754,814.17

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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.