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Finding the Fourth Proportional to 7,987,204.80, 11,980,807.20 and 7,987,204.80

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Solution

The fourth proportional to 7,987,204.80, 11,980,807.20 and 7,987,204.80 is: 11,980,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987,204.80 : 11,980,807.20 = 7,987,204.80 : x
  2. Step 2: Convert to fraction form
    7,987,204.80/11,980,807.20 = 7,987,204.80/x
  3. Step 3: Cross multiply
    7,987,204.80x = 11,980,807.20 × 7,987,204.80
  4. Step 4: Simplify right side
    7,987,204.80x = 95,693,160,775,714.55
  5. Step 5: Solve for x
    x = 95,693,160,775,714.55/7,987,204.80
  6. Step 6: Final answer
    x = 11,980,807.20

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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.