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Finding the Fourth Proportional to 43,839,978.80, 65,764,115.40 and 11,927,274.80

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Solution

The fourth proportional to 43,839,978.80, 65,764,115.40 and 11,927,274.80 is: 17,892,040.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,839,978.80 : 65,764,115.40 = 11,927,274.80 : x
  2. Step 2: Convert to fraction form
    43,839,978.80/65,764,115.40 = 11,927,274.80/x
  3. Step 3: Cross multiply
    43,839,978.80x = 65,764,115.40 × 11,927,274.80
  4. Step 4: Simplify right side
    43,839,978.80x = 784,386,676,354,712
  5. Step 5: Solve for x
    x = 784,386,676,354,712/43,839,978.80
  6. Step 6: Final answer
    x = 17,892,040.50

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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.