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Finding the Fourth Proportional to 7,387,860.70, 11,081,791.05 and 7,221,972.70

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Solution

The fourth proportional to 7,387,860.70, 11,081,791.05 and 7,221,972.70 is: 10,832,959.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,387,860.70 : 11,081,791.05 = 7,221,972.70 : x
  2. Step 2: Convert to fraction form
    7,387,860.70/11,081,791.05 = 7,221,972.70/x
  3. Step 3: Cross multiply
    7,387,860.70x = 11,081,791.05 × 7,221,972.70
  4. Step 4: Simplify right side
    7,387,860.70x = 80,032,392,430,204.34
  5. Step 5: Solve for x
    x = 80,032,392,430,204.34/7,387,860.70
  6. Step 6: Final answer
    x = 10,832,959.05

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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.