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Finding the Fourth Proportional to 87,706.32, 121,005 and 49,953.84

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Solution

The fourth proportional to 87,706.32, 121,005 and 49,953.84 is: 68,919.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,706.32 : 121,005 = 49,953.84 : x
  2. Step 2: Convert to fraction form
    87,706.32/121,005 = 49,953.84/x
  3. Step 3: Cross multiply
    87,706.32x = 121,005 × 49,953.84
  4. Step 4: Simplify right side
    87,706.32x = 6,044,664,409.20
  5. Step 5: Solve for x
    x = 6,044,664,409.20/87,706.32
  6. Step 6: Final answer
    x = 68,919.37

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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.