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Finding the Fourth Proportional to 139,405.88, 192,382.98 and 75,747.80

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Solution

The fourth proportional to 139,405.88, 192,382.98 and 75,747.80 is: 104,533.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,405.88 : 192,382.98 = 75,747.80 : x
  2. Step 2: Convert to fraction form
    139,405.88/192,382.98 = 75,747.80/x
  3. Step 3: Cross multiply
    139,405.88x = 192,382.98 × 75,747.80
  4. Step 4: Simplify right side
    139,405.88x = 14,572,587,492.44
  5. Step 5: Solve for x
    x = 14,572,587,492.44/139,405.88
  6. Step 6: Final answer
    x = 104,533.52

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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.