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Finding the Fourth Proportional to 129,718.72, 178,998.72 and 95,745.76

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Solution

The fourth proportional to 129,718.72, 178,998.72 and 95,745.76 is: 132,119.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,718.72 : 178,998.72 = 95,745.76 : x
  2. Step 2: Convert to fraction form
    129,718.72/178,998.72 = 95,745.76/x
  3. Step 3: Cross multiply
    129,718.72x = 178,998.72 × 95,745.76
  4. Step 4: Simplify right side
    129,718.72x = 17,138,368,485.43
  5. Step 5: Solve for x
    x = 17,138,368,485.43/129,718.72
  6. Step 6: Final answer
    x = 132,119.47

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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.