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Finding the Fourth Proportional to 100,245.87, 138,339.21 and 54,926.68

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Solution

The fourth proportional to 100,245.87, 138,339.21 and 54,926.68 is: 75,798.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,245.87 : 138,339.21 = 54,926.68 : x
  2. Step 2: Convert to fraction form
    100,245.87/138,339.21 = 54,926.68/x
  3. Step 3: Cross multiply
    100,245.87x = 138,339.21 × 54,926.68
  4. Step 4: Simplify right side
    100,245.87x = 7,598,513,519.12
  5. Step 5: Solve for x
    x = 7,598,513,519.12/100,245.87
  6. Step 6: Final answer
    x = 75,798.77

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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.