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Finding the Fourth Proportional to 100,173.44, 138,239.40 and 62,447.84

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Solution

The fourth proportional to 100,173.44, 138,239.40 and 62,447.84 is: 86,178.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,173.44 : 138,239.40 = 62,447.84 : x
  2. Step 2: Convert to fraction form
    100,173.44/138,239.40 = 62,447.84/x
  3. Step 3: Cross multiply
    100,173.44x = 138,239.40 × 62,447.84
  4. Step 4: Simplify right side
    100,173.44x = 8,632,751,932.90
  5. Step 5: Solve for x
    x = 8,632,751,932.90/100,173.44
  6. Step 6: Final answer
    x = 86,178.05

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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.