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Finding the Fourth Proportional to 316,354.37, 474,433.91 and 91,731.37

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Solution

The fourth proportional to 316,354.37, 474,433.91 and 91,731.37 is: 137,568.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,354.37 : 474,433.91 = 91,731.37 : x
  2. Step 2: Convert to fraction form
    316,354.37/474,433.91 = 91,731.37/x
  3. Step 3: Cross multiply
    316,354.37x = 474,433.91 × 91,731.37
  4. Step 4: Simplify right side
    316,354.37x = 43,520,471,582.00
  5. Step 5: Solve for x
    x = 43,520,471,582.00/316,354.37
  6. Step 6: Final answer
    x = 137,568.74

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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.