Home / 129,671.73-178,940.07-72,316.94

Finding the Fourth Proportional to 129,671.73, 178,940.07 and 72,316.94

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Solution

The fourth proportional to 129,671.73, 178,940.07 and 72,316.94 is: 99,793.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,671.73 : 178,940.07 = 72,316.94 : x
  2. Step 2: Convert to fraction form
    129,671.73/178,940.07 = 72,316.94/x
  3. Step 3: Cross multiply
    129,671.73x = 178,940.07 × 72,316.94
  4. Step 4: Simplify right side
    129,671.73x = 12,940,397,411.09
  5. Step 5: Solve for x
    x = 12,940,397,411.09/129,671.73
  6. Step 6: Final answer
    x = 99,793.51

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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.