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Finding the Fourth Proportional to 7,078,428.02, 9,745,858.02 and 6,431,918.02

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Solution

The fourth proportional to 7,078,428.02, 9,745,858.02 and 6,431,918.02 is: 8,855,717.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078,428.02 : 9,745,858.02 = 6,431,918.02 : x
  2. Step 2: Convert to fraction form
    7,078,428.02/9,745,858.02 = 6,431,918.02/x
  3. Step 3: Cross multiply
    7,078,428.02x = 9,745,858.02 × 6,431,918.02
  4. Step 4: Simplify right side
    7,078,428.02x = 62,684,559,819,199.52
  5. Step 5: Solve for x
    x = 62,684,559,819,199.52/7,078,428.02
  6. Step 6: Final answer
    x = 8,855,717.63

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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.