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Finding the Fourth Proportional to 218,800.45, 328,171.51 and 61,015.69

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Solution

The fourth proportional to 218,800.45, 328,171.51 and 61,015.69 is: 91,515.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,800.45 : 328,171.51 = 61,015.69 : x
  2. Step 2: Convert to fraction form
    218,800.45/328,171.51 = 61,015.69/x
  3. Step 3: Cross multiply
    218,800.45x = 328,171.51 × 61,015.69
  4. Step 4: Simplify right side
    218,800.45x = 20,023,611,120.99
  5. Step 5: Solve for x
    x = 20,023,611,120.99/218,800.45
  6. Step 6: Final answer
    x = 91,515.40

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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.