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Finding the Fourth Proportional to 93,220.86, 139,785.53 and 39,905.31

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Solution

The fourth proportional to 93,220.86, 139,785.53 and 39,905.31 is: 59,838.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,220.86 : 139,785.53 = 39,905.31 : x
  2. Step 2: Convert to fraction form
    93,220.86/139,785.53 = 39,905.31/x
  3. Step 3: Cross multiply
    93,220.86x = 139,785.53 × 39,905.31
  4. Step 4: Simplify right side
    93,220.86x = 5,578,184,708.64
  5. Step 5: Solve for x
    x = 5,578,184,708.64/93,220.86
  6. Step 6: Final answer
    x = 59,838.37

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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.