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Finding the Fourth Proportional to 28,978,056.70, 43,467,085.05 and 15,541,128.70

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Solution

The fourth proportional to 28,978,056.70, 43,467,085.05 and 15,541,128.70 is: 23,311,693.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,056.70 : 43,467,085.05 = 15,541,128.70 : x
  2. Step 2: Convert to fraction form
    28,978,056.70/43,467,085.05 = 15,541,128.70/x
  3. Step 3: Cross multiply
    28,978,056.70x = 43,467,085.05 × 15,541,128.70
  4. Step 4: Simplify right side
    28,978,056.70x = 675,527,562,975,895.88
  5. Step 5: Solve for x
    x = 675,527,562,975,895.88/28,978,056.70
  6. Step 6: Final answer
    x = 23,311,693.05

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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.