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Finding the Fourth Proportional to 58,028.66, 79,558.04 and 56,978.90

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Solution

The fourth proportional to 58,028.66, 79,558.04 and 56,978.90 is: 78,118.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,028.66 : 79,558.04 = 56,978.90 : x
  2. Step 2: Convert to fraction form
    58,028.66/79,558.04 = 56,978.90/x
  3. Step 3: Cross multiply
    58,028.66x = 79,558.04 × 56,978.90
  4. Step 4: Simplify right side
    58,028.66x = 4,533,129,605.36
  5. Step 5: Solve for x
    x = 4,533,129,605.36/58,028.66
  6. Step 6: Final answer
    x = 78,118.81

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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.