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Finding the Fourth Proportional to 9,966,556.10, 13,990,969.90 and 9,966,556.10

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Solution

The fourth proportional to 9,966,556.10, 13,990,969.90 and 9,966,556.10 is: 13,990,969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,966,556.10 : 13,990,969.90 = 9,966,556.10 : x
  2. Step 2: Convert to fraction form
    9,966,556.10/13,990,969.90 = 9,966,556.10/x
  3. Step 3: Cross multiply
    9,966,556.10x = 13,990,969.90 × 9,966,556.10
  4. Step 4: Simplify right side
    9,966,556.10x = 139,441,786,401,761.39
  5. Step 5: Solve for x
    x = 139,441,786,401,761.39/9,966,556.10
  6. Step 6: Final answer
    x = 13,990,969.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.