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Finding the Fourth Proportional to 255,898.80, 383,916.26 and 87,418.87

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Solution

The fourth proportional to 255,898.80, 383,916.26 and 87,418.87 is: 131,151.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,898.80 : 383,916.26 = 87,418.87 : x
  2. Step 2: Convert to fraction form
    255,898.80/383,916.26 = 87,418.87/x
  3. Step 3: Cross multiply
    255,898.80x = 383,916.26 × 87,418.87
  4. Step 4: Simplify right side
    255,898.80x = 33,561,525,623.83
  5. Step 5: Solve for x
    x = 33,561,525,623.83/255,898.80
  6. Step 6: Final answer
    x = 131,151.56

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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.