Home / 129,141.54-178,217.01-78,153.66

Finding the Fourth Proportional to 129,141.54, 178,217.01 and 78,153.66

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Solution

The fourth proportional to 129,141.54, 178,217.01 and 78,153.66 is: 107,853.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,141.54 : 178,217.01 = 78,153.66 : x
  2. Step 2: Convert to fraction form
    129,141.54/178,217.01 = 78,153.66/x
  3. Step 3: Cross multiply
    129,141.54x = 178,217.01 × 78,153.66
  4. Step 4: Simplify right side
    129,141.54x = 13,928,311,605.76
  5. Step 5: Solve for x
    x = 13,928,311,605.76/129,141.54
  6. Step 6: Final answer
    x = 107,853.07

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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.