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Finding the Fourth Proportional to 100,338.59, 138,473.48 and 55,626.59

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Solution

The fourth proportional to 100,338.59, 138,473.48 and 55,626.59 is: 76,768.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,338.59 : 138,473.48 = 55,626.59 : x
  2. Step 2: Convert to fraction form
    100,338.59/138,473.48 = 55,626.59/x
  3. Step 3: Cross multiply
    100,338.59x = 138,473.48 × 55,626.59
  4. Step 4: Simplify right side
    100,338.59x = 7,702,807,497.83
  5. Step 5: Solve for x
    x = 7,702,807,497.83/100,338.59
  6. Step 6: Final answer
    x = 76,768.15

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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.