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Finding the Fourth Proportional to 93,305, 128,806.87 and 64,646.39

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Solution

The fourth proportional to 93,305, 128,806.87 and 64,646.39 is: 89,243.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,305 : 128,806.87 = 64,646.39 : x
  2. Step 2: Convert to fraction form
    93,305/128,806.87 = 64,646.39/x
  3. Step 3: Cross multiply
    93,305x = 128,806.87 × 64,646.39
  4. Step 4: Simplify right side
    93,305x = 8,326,899,152.70
  5. Step 5: Solve for x
    x = 8,326,899,152.70/93,305
  6. Step 6: Final answer
    x = 89,243.87

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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.