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Finding the Fourth Proportional to 139,300.14, 192,232.80 and 75,636.60

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Solution

The fourth proportional to 139,300.14, 192,232.80 and 75,636.60 is: 104,377.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,300.14 : 192,232.80 = 75,636.60 : x
  2. Step 2: Convert to fraction form
    139,300.14/192,232.80 = 75,636.60/x
  3. Step 3: Cross multiply
    139,300.14x = 192,232.80 × 75,636.60
  4. Step 4: Simplify right side
    139,300.14x = 14,539,835,400.48
  5. Step 5: Solve for x
    x = 14,539,835,400.48/139,300.14
  6. Step 6: Final answer
    x = 104,377.75

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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.