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Finding the Fourth Proportional to 58,387.96, 79,991.80 and 56,201.28

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Solution

The fourth proportional to 58,387.96, 79,991.80 and 56,201.28 is: 76,996.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,387.96 : 79,991.80 = 56,201.28 : x
  2. Step 2: Convert to fraction form
    58,387.96/79,991.80 = 56,201.28/x
  3. Step 3: Cross multiply
    58,387.96x = 79,991.80 × 56,201.28
  4. Step 4: Simplify right side
    58,387.96x = 4,495,641,549.50
  5. Step 5: Solve for x
    x = 4,495,641,549.50/58,387.96
  6. Step 6: Final answer
    x = 76,996.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.