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Finding the Fourth Proportional to 139,679.84, 192,759.04 and 76,018.30

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Solution

The fourth proportional to 139,679.84, 192,759.04 and 76,018.30 is: 104,905.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,679.84 : 192,759.04 = 76,018.30 : x
  2. Step 2: Convert to fraction form
    139,679.84/192,759.04 = 76,018.30/x
  3. Step 3: Cross multiply
    139,679.84x = 192,759.04 × 76,018.30
  4. Step 4: Simplify right side
    139,679.84x = 14,653,214,143.56
  5. Step 5: Solve for x
    x = 14,653,214,143.56/139,679.84
  6. Step 6: Final answer
    x = 104,905.72

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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.