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Finding the Fourth Proportional to 139,801.33, 192,928.03 and 76,139.07

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Solution

The fourth proportional to 139,801.33, 192,928.03 and 76,139.07 is: 105,073.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,801.33 : 192,928.03 = 76,139.07 : x
  2. Step 2: Convert to fraction form
    139,801.33/192,928.03 = 76,139.07/x
  3. Step 3: Cross multiply
    139,801.33x = 192,928.03 × 76,139.07
  4. Step 4: Simplify right side
    139,801.33x = 14,689,360,400.44
  5. Step 5: Solve for x
    x = 14,689,360,400.44/139,801.33
  6. Step 6: Final answer
    x = 105,073.11

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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.