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Finding the Fourth Proportional to 149,193.73, 205,887.72 and 81,210.70

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Solution

The fourth proportional to 149,193.73, 205,887.72 and 81,210.70 is: 112,070.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,193.73 : 205,887.72 = 81,210.70 : x
  2. Step 2: Convert to fraction form
    149,193.73/205,887.72 = 81,210.70/x
  3. Step 3: Cross multiply
    149,193.73x = 205,887.72 × 81,210.70
  4. Step 4: Simplify right side
    149,193.73x = 16,720,285,862.60
  5. Step 5: Solve for x
    x = 16,720,285,862.60/149,193.73
  6. Step 6: Final answer
    x = 112,070.97

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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.