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Finding the Fourth Proportional to 28,969,992.80, 43,454,989.20 and 28,522,095.20

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Solution

The fourth proportional to 28,969,992.80, 43,454,989.20 and 28,522,095.20 is: 42,783,142.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969,992.80 : 43,454,989.20 = 28,522,095.20 : x
  2. Step 2: Convert to fraction form
    28,969,992.80/43,454,989.20 = 28,522,095.20/x
  3. Step 3: Cross multiply
    28,969,992.80x = 43,454,989.20 × 28,522,095.20
  4. Step 4: Simplify right side
    28,969,992.80x = 1,239,427,338,877,372
  5. Step 5: Solve for x
    x = 1,239,427,338,877,372/28,969,992.80
  6. Step 6: Final answer
    x = 42,783,142.80

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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.