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Finding the Fourth Proportional to 100,965.59, 139,333.49 and 55,645.23

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Solution

The fourth proportional to 100,965.59, 139,333.49 and 55,645.23 is: 76,790.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,965.59 : 139,333.49 = 55,645.23 : x
  2. Step 2: Convert to fraction form
    100,965.59/139,333.49 = 55,645.23/x
  3. Step 3: Cross multiply
    100,965.59x = 139,333.49 × 55,645.23
  4. Step 4: Simplify right side
    100,965.59x = 7,753,244,097.75
  5. Step 5: Solve for x
    x = 7,753,244,097.75/100,965.59
  6. Step 6: Final answer
    x = 76,790.96

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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.