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Finding the Fourth Proportional to 82,978,602.10, 124,467,903.15 and 54,313,155.70

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Solution

The fourth proportional to 82,978,602.10, 124,467,903.15 and 54,313,155.70 is: 81,469,733.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,978,602.10 : 124,467,903.15 = 54,313,155.70 : x
  2. Step 2: Convert to fraction form
    82,978,602.10/124,467,903.15 = 54,313,155.70/x
  3. Step 3: Cross multiply
    82,978,602.10x = 124,467,903.15 × 54,313,155.70
  4. Step 4: Simplify right side
    82,978,602.10x = 6,760,244,603,438,471
  5. Step 5: Solve for x
    x = 6,760,244,603,438,471/82,978,602.10
  6. Step 6: Final answer
    x = 81,469,733.55

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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.