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Finding the Fourth Proportional to 316,661.88, 474,883.20 and 91,961.40

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Solution

The fourth proportional to 316,661.88, 474,883.20 and 91,961.40 is: 137,910.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,661.88 : 474,883.20 = 91,961.40 : x
  2. Step 2: Convert to fraction form
    316,661.88/474,883.20 = 91,961.40/x
  3. Step 3: Cross multiply
    316,661.88x = 474,883.20 × 91,961.40
  4. Step 4: Simplify right side
    316,661.88x = 43,670,923,908.48
  5. Step 5: Solve for x
    x = 43,670,923,908.48/316,661.88
  6. Step 6: Final answer
    x = 137,910.27

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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.