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Finding the Fourth Proportional to 287,327.79, 431,016.44 and 74,093.87

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Solution

The fourth proportional to 287,327.79, 431,016.44 and 74,093.87 is: 111,147.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,327.79 : 431,016.44 = 74,093.87 : x
  2. Step 2: Convert to fraction form
    287,327.79/431,016.44 = 74,093.87/x
  3. Step 3: Cross multiply
    287,327.79x = 431,016.44 × 74,093.87
  4. Step 4: Simplify right side
    287,327.79x = 31,935,676,780.29
  5. Step 5: Solve for x
    x = 31,935,676,780.29/287,327.79
  6. Step 6: Final answer
    x = 111,147.19

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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.