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Finding the Fourth Proportional to 287,568.87, 431,353.31 and 87,889.83

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Solution

The fourth proportional to 287,568.87, 431,353.31 and 87,889.83 is: 131,834.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,568.87 : 431,353.31 = 87,889.83 : x
  2. Step 2: Convert to fraction form
    287,568.87/431,353.31 = 87,889.83/x
  3. Step 3: Cross multiply
    287,568.87x = 431,353.31 × 87,889.83
  4. Step 4: Simplify right side
    287,568.87x = 37,911,569,085.84
  5. Step 5: Solve for x
    x = 37,911,569,085.84/287,568.87
  6. Step 6: Final answer
    x = 131,834.75

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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.