Home / 129,573.78-178,856.55-75,876.06

Finding the Fourth Proportional to 129,573.78, 178,856.55 and 75,876.06

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Solution

The fourth proportional to 129,573.78, 178,856.55 and 75,876.06 is: 104,735.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,573.78 : 178,856.55 = 75,876.06 : x
  2. Step 2: Convert to fraction form
    129,573.78/178,856.55 = 75,876.06/x
  3. Step 3: Cross multiply
    129,573.78x = 178,856.55 × 75,876.06
  4. Step 4: Simplify right side
    129,573.78x = 13,570,930,319.19
  5. Step 5: Solve for x
    x = 13,570,930,319.19/129,573.78
  6. Step 6: Final answer
    x = 104,735.16

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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.