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Finding the Fourth Proportional to 28,975,940.80, 43,463,911.20 and 28,528,043.20

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Solution

The fourth proportional to 28,975,940.80, 43,463,911.20 and 28,528,043.20 is: 42,792,064.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,975,940.80 : 43,463,911.20 = 28,528,043.20 : x
  2. Step 2: Convert to fraction form
    28,975,940.80/43,463,911.20 = 28,528,043.20/x
  3. Step 3: Cross multiply
    28,975,940.80x = 43,463,911.20 × 28,528,043.20
  4. Step 4: Simplify right side
    28,975,940.80x = 1,239,940,336,354,564
  5. Step 5: Solve for x
    x = 1,239,940,336,354,564/28,975,940.80
  6. Step 6: Final answer
    x = 42,792,064.80

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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.