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Finding the Fourth Proportional to 96,693.40, 145,428.90 and 86,584.60

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Solution

The fourth proportional to 96,693.40, 145,428.90 and 86,584.60 is: 130,225.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,693.40 : 145,428.90 = 86,584.60 : x
  2. Step 2: Convert to fraction form
    96,693.40/145,428.90 = 86,584.60/x
  3. Step 3: Cross multiply
    96,693.40x = 145,428.90 × 86,584.60
  4. Step 4: Simplify right side
    96,693.40x = 12,591,903,134.94
  5. Step 5: Solve for x
    x = 12,591,903,134.94/96,693.40
  6. Step 6: Final answer
    x = 130,225.05

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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.