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Finding the Fourth Proportional to 139,341.67, 192,292.50 and 75,679.46

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Solution

The fourth proportional to 139,341.67, 192,292.50 and 75,679.46 is: 104,438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,341.67 : 192,292.50 = 75,679.46 : x
  2. Step 2: Convert to fraction form
    139,341.67/192,292.50 = 75,679.46/x
  3. Step 3: Cross multiply
    139,341.67x = 192,292.50 × 75,679.46
  4. Step 4: Simplify right side
    139,341.67x = 14,552,593,261.43
  5. Step 5: Solve for x
    x = 14,552,593,261.43/139,341.67
  6. Step 6: Final answer
    x = 104,438.20

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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.