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Finding the Fourth Proportional to 7,777,690.20, 11,645,540.10 and 7,777,690.20

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Solution

The fourth proportional to 7,777,690.20, 11,645,540.10 and 7,777,690.20 is: 11,645,540.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,777,690.20 : 11,645,540.10 = 7,777,690.20 : x
  2. Step 2: Convert to fraction form
    7,777,690.20/11,645,540.10 = 7,777,690.20/x
  3. Step 3: Cross multiply
    7,777,690.20x = 11,645,540.10 × 7,777,690.20
  4. Step 4: Simplify right side
    7,777,690.20x = 90,575,403,109,477.02
  5. Step 5: Solve for x
    x = 90,575,403,109,477.02/7,777,690.20
  6. Step 6: Final answer
    x = 11,645,540.10

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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.