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Finding the Fourth Proportional to 87,637.88, 120,940.28 and 49,915.64

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Solution

The fourth proportional to 87,637.88, 120,940.28 and 49,915.64 is: 68,883.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,637.88 : 120,940.28 = 49,915.64 : x
  2. Step 2: Convert to fraction form
    87,637.88/120,940.28 = 49,915.64/x
  3. Step 3: Cross multiply
    87,637.88x = 120,940.28 × 49,915.64
  4. Step 4: Simplify right side
    87,637.88x = 6,036,811,477.98
  5. Step 5: Solve for x
    x = 6,036,811,477.98/87,637.88
  6. Step 6: Final answer
    x = 68,883.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.