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Finding the Fourth Proportional to 92,885.85, 128,202.89 and 61,057.71

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Solution

The fourth proportional to 92,885.85, 128,202.89 and 61,057.71 is: 84,273.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,885.85 : 128,202.89 = 61,057.71 : x
  2. Step 2: Convert to fraction form
    92,885.85/128,202.89 = 61,057.71/x
  3. Step 3: Cross multiply
    92,885.85x = 128,202.89 × 61,057.71
  4. Step 4: Simplify right side
    92,885.85x = 7,827,774,573.49
  5. Step 5: Solve for x
    x = 7,827,774,573.49/92,885.85
  6. Step 6: Final answer
    x = 84,273.06

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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.