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Finding the Fourth Proportional to 316,625.32, 474,962.66 and 91,989.40

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Solution

The fourth proportional to 316,625.32, 474,962.66 and 91,989.40 is: 137,991.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,625.32 : 474,962.66 = 91,989.40 : x
  2. Step 2: Convert to fraction form
    316,625.32/474,962.66 = 91,989.40/x
  3. Step 3: Cross multiply
    316,625.32x = 474,962.66 × 91,989.40
  4. Step 4: Simplify right side
    316,625.32x = 43,691,530,115.80
  5. Step 5: Solve for x
    x = 43,691,530,115.80/316,625.32
  6. Step 6: Final answer
    x = 137,991.27

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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.