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Finding the Fourth Proportional to 139,412.34, 192,388.65 and 75,750.36

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Solution

The fourth proportional to 139,412.34, 192,388.65 and 75,750.36 is: 104,535.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,412.34 : 192,388.65 = 75,750.36 : x
  2. Step 2: Convert to fraction form
    139,412.34/192,388.65 = 75,750.36/x
  3. Step 3: Cross multiply
    139,412.34x = 192,388.65 × 75,750.36
  4. Step 4: Simplify right side
    139,412.34x = 14,573,509,497.41
  5. Step 5: Solve for x
    x = 14,573,509,497.41/139,412.34
  6. Step 6: Final answer
    x = 104,535.29

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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.