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Finding the Fourth Proportional to 7,978,068.39, 11,010,146.49 and 4,879,619.67

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Solution

The fourth proportional to 7,978,068.39, 11,010,146.49 and 4,879,619.67 is: 6,734,127.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978,068.39 : 11,010,146.49 = 4,879,619.67 : x
  2. Step 2: Convert to fraction form
    7,978,068.39/11,010,146.49 = 4,879,619.67/x
  3. Step 3: Cross multiply
    7,978,068.39x = 11,010,146.49 × 4,879,619.67
  4. Step 4: Simplify right side
    7,978,068.39x = 53,725,327,382,185.46
  5. Step 5: Solve for x
    x = 53,725,327,382,185.46/7,978,068.39
  6. Step 6: Final answer
    x = 6,734,127.20

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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.