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Finding the Fourth Proportional to 68,957,568.81, 103,436,352.14 and 65,509,402.05

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Solution

The fourth proportional to 68,957,568.81, 103,436,352.14 and 65,509,402.05 is: 98,264,102.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,957,568.81 : 103,436,352.14 = 65,509,402.05 : x
  2. Step 2: Convert to fraction form
    68,957,568.81/103,436,352.14 = 65,509,402.05/x
  3. Step 3: Cross multiply
    68,957,568.81x = 103,436,352.14 × 65,509,402.05
  4. Step 4: Simplify right side
    68,957,568.81x = 6,776,053,578,597,091
  5. Step 5: Solve for x
    x = 6,776,053,578,597,091/68,957,568.81
  6. Step 6: Final answer
    x = 98,264,102.05

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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.