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Finding the Fourth Proportional to 93,195.78, 139,118.01 and 86,258.16

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Solution

The fourth proportional to 93,195.78, 139,118.01 and 86,258.16 is: 128,761.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,195.78 : 139,118.01 = 86,258.16 : x
  2. Step 2: Convert to fraction form
    93,195.78/139,118.01 = 86,258.16/x
  3. Step 3: Cross multiply
    93,195.78x = 139,118.01 × 86,258.16
  4. Step 4: Simplify right side
    93,195.78x = 12,000,063,565.46
  5. Step 5: Solve for x
    x = 12,000,063,565.46/93,195.78
  6. Step 6: Final answer
    x = 128,761.88

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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.