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Finding the Fourth Proportional to 218,800.58, 328,171.70 and 61,015.82

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Solution

The fourth proportional to 218,800.58, 328,171.70 and 61,015.82 is: 91,515.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,800.58 : 328,171.70 = 61,015.82 : x
  2. Step 2: Convert to fraction form
    218,800.58/328,171.70 = 61,015.82/x
  3. Step 3: Cross multiply
    218,800.58x = 328,171.70 × 61,015.82
  4. Step 4: Simplify right side
    218,800.58x = 20,023,663,887.98
  5. Step 5: Solve for x
    x = 20,023,663,887.98/218,800.58
  6. Step 6: Final answer
    x = 91,515.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.