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Finding the Fourth Proportional to 87,907.36, 131,859.72 and 21,348

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Solution

The fourth proportional to 87,907.36, 131,859.72 and 21,348 is: 32,021.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,907.36 : 131,859.72 = 21,348 : x
  2. Step 2: Convert to fraction form
    87,907.36/131,859.72 = 21,348/x
  3. Step 3: Cross multiply
    87,907.36x = 131,859.72 × 21,348
  4. Step 4: Simplify right side
    87,907.36x = 2,814,941,302.56
  5. Step 5: Solve for x
    x = 2,814,941,302.56/87,907.36
  6. Step 6: Final answer
    x = 32,021.68

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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.