Home / 129,220.05-178,323.60-72,631.41

Finding the Fourth Proportional to 129,220.05, 178,323.60 and 72,631.41

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Solution

The fourth proportional to 129,220.05, 178,323.60 and 72,631.41 is: 100,231.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,220.05 : 178,323.60 = 72,631.41 : x
  2. Step 2: Convert to fraction form
    129,220.05/178,323.60 = 72,631.41/x
  3. Step 3: Cross multiply
    129,220.05x = 178,323.60 × 72,631.41
  4. Step 4: Simplify right side
    129,220.05x = 12,951,894,504.28
  5. Step 5: Solve for x
    x = 12,951,894,504.28/129,220.05
  6. Step 6: Final answer
    x = 100,231.31

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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.