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Finding the Fourth Proportional to 7,139,816.40, 10,693,978.20 and 3,770,086.80

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Solution

The fourth proportional to 7,139,816.40, 10,693,978.20 and 3,770,086.80 is: 5,646,815.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139,816.40 : 10,693,978.20 = 3,770,086.80 : x
  2. Step 2: Convert to fraction form
    7,139,816.40/10,693,978.20 = 3,770,086.80/x
  3. Step 3: Cross multiply
    7,139,816.40x = 10,693,978.20 × 3,770,086.80
  4. Step 4: Simplify right side
    7,139,816.40x = 40,317,226,051,307.76
  5. Step 5: Solve for x
    x = 40,317,226,051,307.76/7,139,816.40
  6. Step 6: Final answer
    x = 5,646,815.52

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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.