Home / 129,278.33-178,257.01-91,025.66

Finding the Fourth Proportional to 129,278.33, 178,257.01 and 91,025.66

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Solution

The fourth proportional to 129,278.33, 178,257.01 and 91,025.66 is: 125,511.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,278.33 : 178,257.01 = 91,025.66 : x
  2. Step 2: Convert to fraction form
    129,278.33/178,257.01 = 91,025.66/x
  3. Step 3: Cross multiply
    129,278.33x = 178,257.01 × 91,025.66
  4. Step 4: Simplify right side
    129,278.33x = 16,225,960,638.46
  5. Step 5: Solve for x
    x = 16,225,960,638.46/129,278.33
  6. Step 6: Final answer
    x = 125,511.84

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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.