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Finding the Fourth Proportional to 93,313.72, 128,789.48 and 55,070.52

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Solution

The fourth proportional to 93,313.72, 128,789.48 and 55,070.52 is: 76,007.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,313.72 : 128,789.48 = 55,070.52 : x
  2. Step 2: Convert to fraction form
    93,313.72/128,789.48 = 55,070.52/x
  3. Step 3: Cross multiply
    93,313.72x = 128,789.48 × 55,070.52
  4. Step 4: Simplify right side
    93,313.72x = 7,092,503,634.13
  5. Step 5: Solve for x
    x = 7,092,503,634.13/93,313.72
  6. Step 6: Final answer
    x = 76,007.08

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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.