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Finding the Fourth Proportional to 93,231.65, 128,656.01 and 56,993.78

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Solution

The fourth proportional to 93,231.65, 128,656.01 and 56,993.78 is: 78,649.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,231.65 : 128,656.01 = 56,993.78 : x
  2. Step 2: Convert to fraction form
    93,231.65/128,656.01 = 56,993.78/x
  3. Step 3: Cross multiply
    93,231.65x = 128,656.01 × 56,993.78
  4. Step 4: Simplify right side
    93,231.65x = 7,332,591,401.37
  5. Step 5: Solve for x
    x = 7,332,591,401.37/93,231.65
  6. Step 6: Final answer
    x = 78,649.17

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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.