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Finding the Fourth Proportional to 6,642,763.70, 9,964,145.55 and 2,155,039.70

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Solution

The fourth proportional to 6,642,763.70, 9,964,145.55 and 2,155,039.70 is: 3,232,559.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642,763.70 : 9,964,145.55 = 2,155,039.70 : x
  2. Step 2: Convert to fraction form
    6,642,763.70/9,964,145.55 = 2,155,039.70/x
  3. Step 3: Cross multiply
    6,642,763.70x = 9,964,145.55 × 2,155,039.70
  4. Step 4: Simplify right side
    6,642,763.70x = 21,473,129,236,828.34
  5. Step 5: Solve for x
    x = 21,473,129,236,828.34/6,642,763.70
  6. Step 6: Final answer
    x = 3,232,559.55

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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.