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Finding the Fourth Proportional to 93,031.54, 128,420.05 and 65,949.18

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Solution

The fourth proportional to 93,031.54, 128,420.05 and 65,949.18 is: 91,035.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,031.54 : 128,420.05 = 65,949.18 : x
  2. Step 2: Convert to fraction form
    93,031.54/128,420.05 = 65,949.18/x
  3. Step 3: Cross multiply
    93,031.54x = 128,420.05 × 65,949.18
  4. Step 4: Simplify right side
    93,031.54x = 8,469,196,993.06
  5. Step 5: Solve for x
    x = 8,469,196,993.06/93,031.54
  6. Step 6: Final answer
    x = 91,035.76

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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.