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Finding the Fourth Proportional to 128,672.22, 177,634.88 and 99,927.40

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Solution

The fourth proportional to 128,672.22, 177,634.88 and 99,927.40 is: 137,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,672.22 : 177,634.88 = 99,927.40 : x
  2. Step 2: Convert to fraction form
    128,672.22/177,634.88 = 99,927.40/x
  3. Step 3: Cross multiply
    128,672.22x = 177,634.88 × 99,927.40
  4. Step 4: Simplify right side
    128,672.22x = 17,750,591,707.71
  5. Step 5: Solve for x
    x = 17,750,591,707.71/128,672.22
  6. Step 6: Final answer
    x = 137,952.01

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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.