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Finding the Fourth Proportional to 100,257.75, 138,355.70 and 59,973.21

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Solution

The fourth proportional to 100,257.75, 138,355.70 and 59,973.21 is: 82,763.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,257.75 : 138,355.70 = 59,973.21 : x
  2. Step 2: Convert to fraction form
    100,257.75/138,355.70 = 59,973.21/x
  3. Step 3: Cross multiply
    100,257.75x = 138,355.70 × 59,973.21
  4. Step 4: Simplify right side
    100,257.75x = 8,297,635,150.93
  5. Step 5: Solve for x
    x = 8,297,635,150.93/100,257.75
  6. Step 6: Final answer
    x = 82,763.03

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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.