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Finding the Fourth Proportional to 84,783,315.70, 127,174,973.55 and 20,957,907.70

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Solution

The fourth proportional to 84,783,315.70, 127,174,973.55 and 20,957,907.70 is: 31,436,861.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,783,315.70 : 127,174,973.55 = 20,957,907.70 : x
  2. Step 2: Convert to fraction form
    84,783,315.70/127,174,973.55 = 20,957,907.70/x
  3. Step 3: Cross multiply
    84,783,315.70x = 127,174,973.55 × 20,957,907.70
  4. Step 4: Simplify right side
    84,783,315.70x = 2,665,321,357,410,841
  5. Step 5: Solve for x
    x = 2,665,321,357,410,841/84,783,315.70
  6. Step 6: Final answer
    x = 31,436,861.55

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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.