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Finding the Fourth Proportional to 139,355.40, 192,312.54 and 75,694.44

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Solution

The fourth proportional to 139,355.40, 192,312.54 and 75,694.44 is: 104,459.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,355.40 : 192,312.54 = 75,694.44 : x
  2. Step 2: Convert to fraction form
    139,355.40/192,312.54 = 75,694.44/x
  3. Step 3: Cross multiply
    139,355.40x = 192,312.54 × 75,694.44
  4. Step 4: Simplify right side
    139,355.40x = 14,556,990,020.28
  5. Step 5: Solve for x
    x = 14,556,990,020.28/139,355.40
  6. Step 6: Final answer
    x = 104,459.46

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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.