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Finding the Fourth Proportional to 6,642,783.45, 9,964,175.18 and 2,155,059.45

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Solution

The fourth proportional to 6,642,783.45, 9,964,175.18 and 2,155,059.45 is: 3,232,589.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642,783.45 : 9,964,175.18 = 2,155,059.45 : x
  2. Step 2: Convert to fraction form
    6,642,783.45/9,964,175.18 = 2,155,059.45/x
  3. Step 3: Cross multiply
    6,642,783.45x = 9,964,175.18 × 2,155,059.45
  4. Step 4: Simplify right side
    6,642,783.45x = 21,473,389,872,339.16
  5. Step 5: Solve for x
    x = 21,473,389,872,339.16/6,642,783.45
  6. Step 6: Final answer
    x = 3,232,589.18

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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.