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Finding the Fourth Proportional to 108,470.56, 149,688.20 and 60,724.30

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Solution

The fourth proportional to 108,470.56, 149,688.20 and 60,724.30 is: 83,798.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,470.56 : 149,688.20 = 60,724.30 : x
  2. Step 2: Convert to fraction form
    108,470.56/149,688.20 = 60,724.30/x
  3. Step 3: Cross multiply
    108,470.56x = 149,688.20 × 60,724.30
  4. Step 4: Simplify right side
    108,470.56x = 9,089,711,163.26
  5. Step 5: Solve for x
    x = 9,089,711,163.26/108,470.56
  6. Step 6: Final answer
    x = 83,798.88

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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.