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Finding the Fourth Proportional to 93,489.72, 129,010.80 and 51,039.96

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Solution

The fourth proportional to 93,489.72, 129,010.80 and 51,039.96 is: 70,432.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,489.72 : 129,010.80 = 51,039.96 : x
  2. Step 2: Convert to fraction form
    93,489.72/129,010.80 = 51,039.96/x
  3. Step 3: Cross multiply
    93,489.72x = 129,010.80 × 51,039.96
  4. Step 4: Simplify right side
    93,489.72x = 6,584,706,071.57
  5. Step 5: Solve for x
    x = 6,584,706,071.57/93,489.72
  6. Step 6: Final answer
    x = 70,432.41

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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.