Home / 129,419.94-178,632.78-100,732.98

Finding the Fourth Proportional to 129,419.94, 178,632.78 and 100,732.98

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Solution

The fourth proportional to 129,419.94, 178,632.78 and 100,732.98 is: 139,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,419.94 : 178,632.78 = 100,732.98 : x
  2. Step 2: Convert to fraction form
    129,419.94/178,632.78 = 100,732.98/x
  3. Step 3: Cross multiply
    129,419.94x = 178,632.78 × 100,732.98
  4. Step 4: Simplify right side
    129,419.94x = 17,994,212,255.08
  5. Step 5: Solve for x
    x = 17,994,212,255.08/129,419.94
  6. Step 6: Final answer
    x = 139,037.40

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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.