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Finding the Fourth Proportional to 68,259,701.70, 102,389,552.55 and 19,739,138.40

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Solution

The fourth proportional to 68,259,701.70, 102,389,552.55 and 19,739,138.40 is: 29,608,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,259,701.70 : 102,389,552.55 = 19,739,138.40 : x
  2. Step 2: Convert to fraction form
    68,259,701.70/102,389,552.55 = 19,739,138.40/x
  3. Step 3: Cross multiply
    68,259,701.70x = 102,389,552.55 × 19,739,138.40
  4. Step 4: Simplify right side
    68,259,701.70x = 2,021,081,548,498,522.75
  5. Step 5: Solve for x
    x = 2,021,081,548,498,522.75/68,259,701.70
  6. Step 6: Final answer
    x = 29,608,707.60

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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.