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Finding the Fourth Proportional to 139,801.26, 192,927.94 and 76,139.01

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Solution

The fourth proportional to 139,801.26, 192,927.94 and 76,139.01 is: 105,073.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,801.26 : 192,927.94 = 76,139.01 : x
  2. Step 2: Convert to fraction form
    139,801.26/192,927.94 = 76,139.01/x
  3. Step 3: Cross multiply
    139,801.26x = 192,927.94 × 76,139.01
  4. Step 4: Simplify right side
    139,801.26x = 14,689,342,352.94
  5. Step 5: Solve for x
    x = 14,689,342,352.94/139,801.26
  6. Step 6: Final answer
    x = 105,073.03

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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.