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Finding the Fourth Proportional to 139,622.95, 207,855.26 and 138,792.58

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Solution

The fourth proportional to 139,622.95, 207,855.26 and 138,792.58 is: 206,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,622.95 : 207,855.26 = 138,792.58 : x
  2. Step 2: Convert to fraction form
    139,622.95/207,855.26 = 138,792.58/x
  3. Step 3: Cross multiply
    139,622.95x = 207,855.26 × 138,792.58
  4. Step 4: Simplify right side
    139,622.95x = 28,848,767,801.97
  5. Step 5: Solve for x
    x = 28,848,767,801.97/139,622.95
  6. Step 6: Final answer
    x = 206,619.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.