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Finding the Fourth Proportional to 139,321.32, 192,261.74 and 75,659.58

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Solution

The fourth proportional to 139,321.32, 192,261.74 and 75,659.58 is: 104,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,321.32 : 192,261.74 = 75,659.58 : x
  2. Step 2: Convert to fraction form
    139,321.32/192,261.74 = 75,659.58/x
  3. Step 3: Cross multiply
    139,321.32x = 192,261.74 × 75,659.58
  4. Step 4: Simplify right side
    139,321.32x = 14,546,442,120.17
  5. Step 5: Solve for x
    x = 14,546,442,120.17/139,321.32
  6. Step 6: Final answer
    x = 104,409.30

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1.5x scale

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.