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Finding the Fourth Proportional to 87,758.90, 131,649.28 and 28,578.68

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Solution

The fourth proportional to 87,758.90, 131,649.28 and 28,578.68 is: 42,871.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,758.90 : 131,649.28 = 28,578.68 : x
  2. Step 2: Convert to fraction form
    87,758.90/131,649.28 = 28,578.68/x
  3. Step 3: Cross multiply
    87,758.90x = 131,649.28 × 28,578.68
  4. Step 4: Simplify right side
    87,758.90x = 3,762,362,645.35
  5. Step 5: Solve for x
    x = 3,762,362,645.35/87,758.90
  6. Step 6: Final answer
    x = 42,871.58

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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.