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Finding the Fourth Proportional to 139,614.94, 207,843.34 and 138,784.58

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Solution

The fourth proportional to 139,614.94, 207,843.34 and 138,784.58 is: 206,607.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,614.94 : 207,843.34 = 138,784.58 : x
  2. Step 2: Convert to fraction form
    139,614.94/207,843.34 = 138,784.58/x
  3. Step 3: Cross multiply
    139,614.94x = 207,843.34 × 138,784.58
  4. Step 4: Simplify right side
    139,614.94x = 28,845,450,994.66
  5. Step 5: Solve for x
    x = 28,845,450,994.66/139,614.94
  6. Step 6: Final answer
    x = 206,607.19

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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.