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Finding the Fourth Proportional to 139,655.88, 192,719.34 and 75,993.66

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Solution

The fourth proportional to 139,655.88, 192,719.34 and 75,993.66 is: 104,868.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,655.88 : 192,719.34 = 75,993.66 : x
  2. Step 2: Convert to fraction form
    139,655.88/192,719.34 = 75,993.66/x
  3. Step 3: Cross multiply
    139,655.88x = 192,719.34 × 75,993.66
  4. Step 4: Simplify right side
    139,655.88x = 14,645,447,999.38
  5. Step 5: Solve for x
    x = 14,645,447,999.38/139,655.88
  6. Step 6: Final answer
    x = 104,868.11

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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.