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Finding the Fourth Proportional to 61,129.50, 84,331.98 and 43,239.84

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Solution

The fourth proportional to 61,129.50, 84,331.98 and 43,239.84 is: 59,652.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,129.50 : 84,331.98 = 43,239.84 : x
  2. Step 2: Convert to fraction form
    61,129.50/84,331.98 = 43,239.84/x
  3. Step 3: Cross multiply
    61,129.50x = 84,331.98 × 43,239.84
  4. Step 4: Simplify right side
    61,129.50x = 3,646,501,322.08
  5. Step 5: Solve for x
    x = 3,646,501,322.08/61,129.50
  6. Step 6: Final answer
    x = 59,652.07

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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.