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Finding the Fourth Proportional to 208,571,299.56, 287,809,374.06 and 123,783,797.88

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Solution

The fourth proportional to 208,571,299.56, 287,809,374.06 and 123,783,797.88 is: 170,810,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,571,299.56 : 287,809,374.06 = 123,783,797.88 : x
  2. Step 2: Convert to fraction form
    208,571,299.56/287,809,374.06 = 123,783,797.88/x
  3. Step 3: Cross multiply
    208,571,299.56x = 287,809,374.06 × 123,783,797.88
  4. Step 4: Simplify right side
    208,571,299.56x = 35,626,137,386,612,352
  5. Step 5: Solve for x
    x = 35,626,137,386,612,352/208,571,299.56
  6. Step 6: Final answer
    x = 170,810,353.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.