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Finding the Fourth Proportional to 139,846.39, 193,001.95 and 85,395.55

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Solution

The fourth proportional to 139,846.39, 193,001.95 and 85,395.55 is: 117,854.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,846.39 : 193,001.95 = 85,395.55 : x
  2. Step 2: Convert to fraction form
    139,846.39/193,001.95 = 85,395.55/x
  3. Step 3: Cross multiply
    139,846.39x = 193,001.95 × 85,395.55
  4. Step 4: Simplify right side
    139,846.39x = 16,481,507,671.32
  5. Step 5: Solve for x
    x = 16,481,507,671.32/139,846.39
  6. Step 6: Final answer
    x = 117,854.37

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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.