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Finding the Fourth Proportional to 186,787,261.60, 279,802,978.80 and 129,344,394.40

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Solution

The fourth proportional to 186,787,261.60, 279,802,978.80 and 129,344,394.40 is: 193,754,898.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,787,261.60 : 279,802,978.80 = 129,344,394.40 : x
  2. Step 2: Convert to fraction form
    186,787,261.60/279,802,978.80 = 129,344,394.40/x
  3. Step 3: Cross multiply
    186,787,261.60x = 279,802,978.80 × 129,344,394.40
  4. Step 4: Simplify right side
    186,787,261.60x = 36,190,946,844,202,040
  5. Step 5: Solve for x
    x = 36,190,946,844,202,040/186,787,261.60
  6. Step 6: Final answer
    x = 193,754,898.13

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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.