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Finding the Fourth Proportional to 100,825.82, 139,134.86 and 55,502.88

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Solution

The fourth proportional to 100,825.82, 139,134.86 and 55,502.88 is: 76,591.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,825.82 : 139,134.86 = 55,502.88 : x
  2. Step 2: Convert to fraction form
    100,825.82/139,134.86 = 55,502.88/x
  3. Step 3: Cross multiply
    100,825.82x = 139,134.86 × 55,502.88
  4. Step 4: Simplify right side
    100,825.82x = 7,722,385,438.40
  5. Step 5: Solve for x
    x = 7,722,385,438.40/100,825.82
  6. Step 6: Final answer
    x = 76,591.35

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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.