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Finding the Fourth Proportional to 47,995,093.80, 71,992,640.70 and 28,815,978.60

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Solution

The fourth proportional to 47,995,093.80, 71,992,640.70 and 28,815,978.60 is: 43,223,967.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,995,093.80 : 71,992,640.70 = 28,815,978.60 : x
  2. Step 2: Convert to fraction form
    47,995,093.80/71,992,640.70 = 28,815,978.60/x
  3. Step 3: Cross multiply
    47,995,093.80x = 71,992,640.70 × 28,815,978.60
  4. Step 4: Simplify right side
    47,995,093.80x = 2,074,538,393,768,689.25
  5. Step 5: Solve for x
    x = 2,074,538,393,768,689.25/47,995,093.80
  6. Step 6: Final answer
    x = 43,223,967.90

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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.