Home / 129,450.36-178,696.77-87,033.50

Finding the Fourth Proportional to 129,450.36, 178,696.77 and 87,033.50

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Solution

The fourth proportional to 129,450.36, 178,696.77 and 87,033.50 is: 120,143.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,450.36 : 178,696.77 = 87,033.50 : x
  2. Step 2: Convert to fraction form
    129,450.36/178,696.77 = 87,033.50/x
  3. Step 3: Cross multiply
    129,450.36x = 178,696.77 × 87,033.50
  4. Step 4: Simplify right side
    129,450.36x = 15,552,605,331.80
  5. Step 5: Solve for x
    x = 15,552,605,331.80/129,450.36
  6. Step 6: Final answer
    x = 120,143.39

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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.