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Finding the Fourth Proportional to 93,009.33, 128,135.90 and 64,665.81

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Solution

The fourth proportional to 93,009.33, 128,135.90 and 64,665.81 is: 89,087.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,009.33 : 128,135.90 = 64,665.81 : x
  2. Step 2: Convert to fraction form
    93,009.33/128,135.90 = 64,665.81/x
  3. Step 3: Cross multiply
    93,009.33x = 128,135.90 × 64,665.81
  4. Step 4: Simplify right side
    93,009.33x = 8,286,011,440.25
  5. Step 5: Solve for x
    x = 8,286,011,440.25/93,009.33
  6. Step 6: Final answer
    x = 89,087.96

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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.