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Finding the Fourth Proportional to 287,676.29, 431,562.96 and 87,949.89

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Solution

The fourth proportional to 287,676.29, 431,562.96 and 87,949.89 is: 131,939.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,676.29 : 431,562.96 = 87,949.89 : x
  2. Step 2: Convert to fraction form
    287,676.29/431,562.96 = 87,949.89/x
  3. Step 3: Cross multiply
    287,676.29x = 431,562.96 × 87,949.89
  4. Step 4: Simplify right side
    287,676.29x = 37,955,914,860.07
  5. Step 5: Solve for x
    x = 37,955,914,860.07/287,676.29
  6. Step 6: Final answer
    x = 131,939.67

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1.5x scale

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.