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Finding the Fourth Proportional to 139,614.45, 207,842.60 and 138,784.08

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Solution

The fourth proportional to 139,614.45, 207,842.60 and 138,784.08 is: 206,606.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,614.45 : 207,842.60 = 138,784.08 : x
  2. Step 2: Convert to fraction form
    139,614.45/207,842.60 = 138,784.08/x
  3. Step 3: Cross multiply
    139,614.45x = 207,842.60 × 138,784.08
  4. Step 4: Simplify right side
    139,614.45x = 28,845,242,292.67
  5. Step 5: Solve for x
    x = 28,845,242,292.67/139,614.45
  6. Step 6: Final answer
    x = 206,606.43

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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.