Home / 129,260.11-178,378.94-72,671.48

Finding the Fourth Proportional to 129,260.11, 178,378.94 and 72,671.48

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Solution

The fourth proportional to 129,260.11, 178,378.94 and 72,671.48 is: 100,286.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,260.11 : 178,378.94 = 72,671.48 : x
  2. Step 2: Convert to fraction form
    129,260.11/178,378.94 = 72,671.48/x
  3. Step 3: Cross multiply
    129,260.11x = 178,378.94 × 72,671.48
  4. Step 4: Simplify right side
    129,260.11x = 12,963,062,532.72
  5. Step 5: Solve for x
    x = 12,963,062,532.72/129,260.11
  6. Step 6: Final answer
    x = 100,286.64

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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.