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Finding the Fourth Proportional to 128,820.51, 177,690.51 and 93,063.06

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Solution

The fourth proportional to 128,820.51, 177,690.51 and 93,063.06 is: 128,367.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,820.51 : 177,690.51 = 93,063.06 : x
  2. Step 2: Convert to fraction form
    128,820.51/177,690.51 = 93,063.06/x
  3. Step 3: Cross multiply
    128,820.51x = 177,690.51 × 93,063.06
  4. Step 4: Simplify right side
    128,820.51x = 16,536,422,593.56
  5. Step 5: Solve for x
    x = 16,536,422,593.56/128,820.51
  6. Step 6: Final answer
    x = 128,367.93

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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.