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Finding the Fourth Proportional to 139,321, 192,261.28 and 75,659.25

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Solution

The fourth proportional to 139,321, 192,261.28 and 75,659.25 is: 104,408.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,321 : 192,261.28 = 75,659.25 : x
  2. Step 2: Convert to fraction form
    139,321/192,261.28 = 75,659.25/x
  3. Step 3: Cross multiply
    139,321x = 192,261.28 × 75,659.25
  4. Step 4: Simplify right side
    139,321x = 14,546,344,248.84
  5. Step 5: Solve for x
    x = 14,546,344,248.84/139,321
  6. Step 6: Final answer
    x = 104,408.84

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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.