Home / 129,183.36-178,263.84-72,603.36

Finding the Fourth Proportional to 129,183.36, 178,263.84 and 72,603.36

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Solution

The fourth proportional to 129,183.36, 178,263.84 and 72,603.36 is: 100,187.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,183.36 : 178,263.84 = 72,603.36 : x
  2. Step 2: Convert to fraction form
    129,183.36/178,263.84 = 72,603.36/x
  3. Step 3: Cross multiply
    129,183.36x = 178,263.84 × 72,603.36
  4. Step 4: Simplify right side
    129,183.36x = 12,942,553,750.50
  5. Step 5: Solve for x
    x = 12,942,553,750.50/129,183.36
  6. Step 6: Final answer
    x = 100,187.47

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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.