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Finding the Fourth Proportional to 218,711.68, 328,064.64 and 60,940.96

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Solution

The fourth proportional to 218,711.68, 328,064.64 and 60,940.96 is: 91,410.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,711.68 : 328,064.64 = 60,940.96 : x
  2. Step 2: Convert to fraction form
    218,711.68/328,064.64 = 60,940.96/x
  3. Step 3: Cross multiply
    218,711.68x = 328,064.64 × 60,940.96
  4. Step 4: Simplify right side
    218,711.68x = 19,992,574,103.65
  5. Step 5: Solve for x
    x = 19,992,574,103.65/218,711.68
  6. Step 6: Final answer
    x = 91,410.64

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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.