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Finding the Fourth Proportional to 78,111.83, 107,795.38 and 43,655.05

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Solution

The fourth proportional to 78,111.83, 107,795.38 and 43,655.05 is: 60,244.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,111.83 : 107,795.38 = 43,655.05 : x
  2. Step 2: Convert to fraction form
    78,111.83/107,795.38 = 43,655.05/x
  3. Step 3: Cross multiply
    78,111.83x = 107,795.38 × 43,655.05
  4. Step 4: Simplify right side
    78,111.83x = 4,705,812,325.04
  5. Step 5: Solve for x
    x = 4,705,812,325.04/78,111.83
  6. Step 6: Final answer
    x = 60,244.55

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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.