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Finding the Fourth Proportional to 93,197.78, 139,121 and 86,260.16

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Solution

The fourth proportional to 93,197.78, 139,121 and 86,260.16 is: 128,764.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,197.78 : 139,121 = 86,260.16 : x
  2. Step 2: Convert to fraction form
    93,197.78/139,121 = 86,260.16/x
  3. Step 3: Cross multiply
    93,197.78x = 139,121 × 86,260.16
  4. Step 4: Simplify right side
    93,197.78x = 12,000,599,719.36
  5. Step 5: Solve for x
    x = 12,000,599,719.36/93,197.78
  6. Step 6: Final answer
    x = 128,764.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.