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Finding the Fourth Proportional to 128,963.88, 193,440.96 and 53,059.59

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Solution

The fourth proportional to 128,963.88, 193,440.96 and 53,059.59 is: 79,587.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,963.88 : 193,440.96 = 53,059.59 : x
  2. Step 2: Convert to fraction form
    128,963.88/193,440.96 = 53,059.59/x
  3. Step 3: Cross multiply
    128,963.88x = 193,440.96 × 53,059.59
  4. Step 4: Simplify right side
    128,963.88x = 10,263,898,026.81
  5. Step 5: Solve for x
    x = 10,263,898,026.81/128,963.88
  6. Step 6: Final answer
    x = 79,587.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.