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Finding the Fourth Proportional to 79,040.60, 109,026.15 and 55,158.56

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Solution

The fourth proportional to 79,040.60, 109,026.15 and 55,158.56 is: 76,084.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,040.60 : 109,026.15 = 55,158.56 : x
  2. Step 2: Convert to fraction form
    79,040.60/109,026.15 = 55,158.56/x
  3. Step 3: Cross multiply
    79,040.60x = 109,026.15 × 55,158.56
  4. Step 4: Simplify right side
    79,040.60x = 6,013,724,891.21
  5. Step 5: Solve for x
    x = 6,013,724,891.21/79,040.60
  6. Step 6: Final answer
    x = 76,084.00

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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.