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Finding the Fourth Proportional to 128,602.07, 193,022.79 and 65,469.45

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Solution

The fourth proportional to 128,602.07, 193,022.79 and 65,469.45 is: 98,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.07 : 193,022.79 = 65,469.45 : x
  2. Step 2: Convert to fraction form
    128,602.07/193,022.79 = 65,469.45/x
  3. Step 3: Cross multiply
    128,602.07x = 193,022.79 × 65,469.45
  4. Step 4: Simplify right side
    128,602.07x = 12,637,095,898.77
  5. Step 5: Solve for x
    x = 12,637,095,898.77/128,602.07
  6. Step 6: Final answer
    x = 98,265.10

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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.