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Finding the Fourth Proportional to 316,897.66, 475,406.43 and 127,372.78

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Solution

The fourth proportional to 316,897.66, 475,406.43 and 127,372.78 is: 191,083.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,897.66 : 475,406.43 = 127,372.78 : x
  2. Step 2: Convert to fraction form
    316,897.66/475,406.43 = 127,372.78/x
  3. Step 3: Cross multiply
    316,897.66x = 475,406.43 × 127,372.78
  4. Step 4: Simplify right side
    316,897.66x = 60,553,838,618.98
  5. Step 5: Solve for x
    x = 60,553,838,618.98/316,897.66
  6. Step 6: Final answer
    x = 191,083.26

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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.