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Finding the Fourth Proportional to 93,409.81, 128,905.29 and 50,968.31

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Solution

The fourth proportional to 93,409.81, 128,905.29 and 50,968.31 is: 70,336.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,409.81 : 128,905.29 = 50,968.31 : x
  2. Step 2: Convert to fraction form
    93,409.81/128,905.29 = 50,968.31/x
  3. Step 3: Cross multiply
    93,409.81x = 128,905.29 × 50,968.31
  4. Step 4: Simplify right side
    93,409.81x = 6,570,084,136.83
  5. Step 5: Solve for x
    x = 6,570,084,136.83/93,409.81
  6. Step 6: Final answer
    x = 70,336.13

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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.