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Finding the Fourth Proportional to 211,128.90, 316,110.15 and 164,472.90

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Solution

The fourth proportional to 211,128.90, 316,110.15 and 164,472.90 is: 246,255.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,128.90 : 316,110.15 = 164,472.90 : x
  2. Step 2: Convert to fraction form
    211,128.90/316,110.15 = 164,472.90/x
  3. Step 3: Cross multiply
    211,128.90x = 316,110.15 × 164,472.90
  4. Step 4: Simplify right side
    211,128.90x = 51,991,553,089.94
  5. Step 5: Solve for x
    x = 51,991,553,089.94/211,128.90
  6. Step 6: Final answer
    x = 246,255.03

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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.