Home / 129,260.16-178,376-72,671.36

Finding the Fourth Proportional to 129,260.16, 178,376 and 72,671.36

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Solution

The fourth proportional to 129,260.16, 178,376 and 72,671.36 is: 100,284.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,260.16 : 178,376 = 72,671.36 : x
  2. Step 2: Convert to fraction form
    129,260.16/178,376 = 72,671.36/x
  3. Step 3: Cross multiply
    129,260.16x = 178,376 × 72,671.36
  4. Step 4: Simplify right side
    129,260.16x = 12,962,826,511.36
  5. Step 5: Solve for x
    x = 12,962,826,511.36/129,260.16
  6. Step 6: Final answer
    x = 100,284.78

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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.