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Finding the Fourth Proportional to 64,969.16, 89,654.90 and 40,783.14

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Solution

The fourth proportional to 64,969.16, 89,654.90 and 40,783.14 is: 56,279.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,969.16 : 89,654.90 = 40,783.14 : x
  2. Step 2: Convert to fraction form
    64,969.16/89,654.90 = 40,783.14/x
  3. Step 3: Cross multiply
    64,969.16x = 89,654.90 × 40,783.14
  4. Step 4: Simplify right side
    64,969.16x = 3,656,408,338.39
  5. Step 5: Solve for x
    x = 3,656,408,338.39/64,969.16
  6. Step 6: Final answer
    x = 56,279.14

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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.