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Finding the Fourth Proportional to 93,409.98, 128,908.62 and 53,129.54

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Solution

The fourth proportional to 93,409.98, 128,908.62 and 53,129.54 is: 73,320.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,409.98 : 128,908.62 = 53,129.54 : x
  2. Step 2: Convert to fraction form
    93,409.98/128,908.62 = 53,129.54/x
  3. Step 3: Cross multiply
    93,409.98x = 128,908.62 × 53,129.54
  4. Step 4: Simplify right side
    93,409.98x = 6,848,855,416.99
  5. Step 5: Solve for x
    x = 6,848,855,416.99/93,409.98
  6. Step 6: Final answer
    x = 73,320.38

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1.5x scale

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.