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Finding the Fourth Proportional to 50,999, 70,385.22 and 28,643

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Solution

The fourth proportional to 50,999, 70,385.22 and 28,643 is: 39,531.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,999 : 70,385.22 = 28,643 : x
  2. Step 2: Convert to fraction form
    50,999/70,385.22 = 28,643/x
  3. Step 3: Cross multiply
    50,999x = 70,385.22 × 28,643
  4. Step 4: Simplify right side
    50,999x = 2,016,043,856.46
  5. Step 5: Solve for x
    x = 2,016,043,856.46/50,999
  6. Step 6: Final answer
    x = 39,531.05

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