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Finding the Fourth Proportional to 139,438.51, 192,426.36 and 75,776.30

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Solution

The fourth proportional to 139,438.51, 192,426.36 and 75,776.30 is: 104,571.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,438.51 : 192,426.36 = 75,776.30 : x
  2. Step 2: Convert to fraction form
    139,438.51/192,426.36 = 75,776.30/x
  3. Step 3: Cross multiply
    139,438.51x = 192,426.36 × 75,776.30
  4. Step 4: Simplify right side
    139,438.51x = 14,581,357,583.27
  5. Step 5: Solve for x
    x = 14,581,357,583.27/139,438.51
  6. Step 6: Final answer
    x = 104,571.95

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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.