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Finding the Fourth Proportional to 139,033.90, 191,866.32 and 75,371.70

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Solution

The fourth proportional to 139,033.90, 191,866.32 and 75,371.70 is: 104,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,033.90 : 191,866.32 = 75,371.70 : x
  2. Step 2: Convert to fraction form
    139,033.90/191,866.32 = 75,371.70/x
  3. Step 3: Cross multiply
    139,033.90x = 191,866.32 × 75,371.70
  4. Step 4: Simplify right side
    139,033.90x = 14,461,290,711.14
  5. Step 5: Solve for x
    x = 14,461,290,711.14/139,033.90
  6. Step 6: Final answer
    x = 104,012.70

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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.