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Finding the Fourth Proportional to 139,235.76, 192,146 and 75,573.56

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Solution

The fourth proportional to 139,235.76, 192,146 and 75,573.56 is: 104,291.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235.76 : 192,146 = 75,573.56 : x
  2. Step 2: Convert to fraction form
    139,235.76/192,146 = 75,573.56/x
  3. Step 3: Cross multiply
    139,235.76x = 192,146 × 75,573.56
  4. Step 4: Simplify right side
    139,235.76x = 14,521,157,259.76
  5. Step 5: Solve for x
    x = 14,521,157,259.76/139,235.76
  6. Step 6: Final answer
    x = 104,291.87

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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.