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Finding the Fourth Proportional to 139,701.31, 192,786.48 and 76,038.95

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Solution

The fourth proportional to 139,701.31, 192,786.48 and 76,038.95 is: 104,933.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,701.31 : 192,786.48 = 76,038.95 : x
  2. Step 2: Convert to fraction form
    139,701.31/192,786.48 = 76,038.95/x
  3. Step 3: Cross multiply
    139,701.31x = 192,786.48 × 76,038.95
  4. Step 4: Simplify right side
    139,701.31x = 14,659,281,995.36
  5. Step 5: Solve for x
    x = 14,659,281,995.36/139,701.31
  6. Step 6: Final answer
    x = 104,933.03

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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.