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Finding the Fourth Proportional to 139,437.94, 192,425.56 and 75,775.72

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Solution

The fourth proportional to 139,437.94, 192,425.56 and 75,775.72 is: 104,571.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,437.94 : 192,425.56 = 75,775.72 : x
  2. Step 2: Convert to fraction form
    139,437.94/192,425.56 = 75,775.72/x
  3. Step 3: Cross multiply
    139,437.94x = 192,425.56 × 75,775.72
  4. Step 4: Simplify right side
    139,437.94x = 14,581,185,355.40
  5. Step 5: Solve for x
    x = 14,581,185,355.40/139,437.94
  6. Step 6: Final answer
    x = 104,571.15

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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.