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Finding the Fourth Proportional to 7,045,842.12, 9,723,861.78 and 3,990,599.88

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Solution

The fourth proportional to 7,045,842.12, 9,723,861.78 and 3,990,599.88 is: 5,507,367.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,045,842.12 : 9,723,861.78 = 3,990,599.88 : x
  2. Step 2: Convert to fraction form
    7,045,842.12/9,723,861.78 = 3,990,599.88/x
  3. Step 3: Cross multiply
    7,045,842.12x = 9,723,861.78 × 3,990,599.88
  4. Step 4: Simplify right side
    7,045,842.12x = 38,804,041,652,404.59
  5. Step 5: Solve for x
    x = 38,804,041,652,404.59/7,045,842.12
  6. Step 6: Final answer
    x = 5,507,367.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.