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Finding the Fourth Proportional to 92,605.28, 138,705.60 and 56,958.08

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Solution

The fourth proportional to 92,605.28, 138,705.60 and 56,958.08 is: 85,312.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,605.28 : 138,705.60 = 56,958.08 : x
  2. Step 2: Convert to fraction form
    92,605.28/138,705.60 = 56,958.08/x
  3. Step 3: Cross multiply
    92,605.28x = 138,705.60 × 56,958.08
  4. Step 4: Simplify right side
    92,605.28x = 7,900,404,661.25
  5. Step 5: Solve for x
    x = 7,900,404,661.25/92,605.28
  6. Step 6: Final answer
    x = 85,312.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.