Home / 129,165.21-178,269.39-75,450.06

Finding the Fourth Proportional to 129,165.21, 178,269.39 and 75,450.06

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Solution

The fourth proportional to 129,165.21, 178,269.39 and 75,450.06 is: 104,133.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,165.21 : 178,269.39 = 75,450.06 : x
  2. Step 2: Convert to fraction form
    129,165.21/178,269.39 = 75,450.06/x
  3. Step 3: Cross multiply
    129,165.21x = 178,269.39 × 75,450.06
  4. Step 4: Simplify right side
    129,165.21x = 13,450,436,171.66
  5. Step 5: Solve for x
    x = 13,450,436,171.66/129,165.21
  6. Step 6: Final answer
    x = 104,133.58

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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.