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Finding the Fourth Proportional to 138,453.15, 207,695.21 and 43,696.82

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Solution

The fourth proportional to 138,453.15, 207,695.21 and 43,696.82 is: 65,550.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,453.15 : 207,695.21 = 43,696.82 : x
  2. Step 2: Convert to fraction form
    138,453.15/207,695.21 = 43,696.82/x
  3. Step 3: Cross multiply
    138,453.15x = 207,695.21 × 43,696.82
  4. Step 4: Simplify right side
    138,453.15x = 9,075,618,949.27
  5. Step 5: Solve for x
    x = 9,075,618,949.27/138,453.15
  6. Step 6: Final answer
    x = 65,550.11

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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.