Home / 138,165.54-190,667.10-76,910.76

Finding the Fourth Proportional to 138,165.54, 190,667.10 and 76,910.76

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Solution

The fourth proportional to 138,165.54, 190,667.10 and 76,910.76 is: 106,136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,165.54 : 190,667.10 = 76,910.76 : x
  2. Step 2: Convert to fraction form
    138,165.54/190,667.10 = 76,910.76/x
  3. Step 3: Cross multiply
    138,165.54x = 190,667.10 × 76,910.76
  4. Step 4: Simplify right side
    138,165.54x = 14,664,351,568.00
  5. Step 5: Solve for x
    x = 14,664,351,568.00/138,165.54
  6. Step 6: Final answer
    x = 106,136.10

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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.