Home / 128,279.56-177,025.38-71,691.16

Finding the Fourth Proportional to 128,279.56, 177,025.38 and 71,691.16

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Solution

The fourth proportional to 128,279.56, 177,025.38 and 71,691.16 is: 98,933.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,279.56 : 177,025.38 = 71,691.16 : x
  2. Step 2: Convert to fraction form
    128,279.56/177,025.38 = 71,691.16/x
  3. Step 3: Cross multiply
    128,279.56x = 177,025.38 × 71,691.16
  4. Step 4: Simplify right side
    128,279.56x = 12,691,154,841.64
  5. Step 5: Solve for x
    x = 12,691,154,841.64/128,279.56
  6. Step 6: Final answer
    x = 98,933.57

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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.