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Finding the Fourth Proportional to 139,033.58, 191,865.90 and 75,371.38

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Solution

The fourth proportional to 139,033.58, 191,865.90 and 75,371.38 is: 104,012.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,033.58 : 191,865.90 = 75,371.38 : x
  2. Step 2: Convert to fraction form
    139,033.58/191,865.90 = 75,371.38/x
  3. Step 3: Cross multiply
    139,033.58x = 191,865.90 × 75,371.38
  4. Step 4: Simplify right side
    139,033.58x = 14,461,197,036.96
  5. Step 5: Solve for x
    x = 14,461,197,036.96/139,033.58
  6. Step 6: Final answer
    x = 104,012.26

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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.