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Finding the Fourth Proportional to 211,089.40, 315,942.90 and 164,087.80

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Solution

The fourth proportional to 211,089.40, 315,942.90 and 164,087.80 is: 245,594.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,089.40 : 315,942.90 = 164,087.80 : x
  2. Step 2: Convert to fraction form
    211,089.40/315,942.90 = 164,087.80/x
  3. Step 3: Cross multiply
    211,089.40x = 315,942.90 × 164,087.80
  4. Step 4: Simplify right side
    211,089.40x = 51,842,375,386.62
  5. Step 5: Solve for x
    x = 51,842,375,386.62/211,089.40
  6. Step 6: Final answer
    x = 245,594.40

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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.