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Finding the Fourth Proportional to 100,600.78, 138,832.83 and 60,321.10

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Solution

The fourth proportional to 100,600.78, 138,832.83 and 60,321.10 is: 83,245.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,600.78 : 138,832.83 = 60,321.10 : x
  2. Step 2: Convert to fraction form
    100,600.78/138,832.83 = 60,321.10/x
  3. Step 3: Cross multiply
    100,600.78x = 138,832.83 × 60,321.10
  4. Step 4: Simplify right side
    100,600.78x = 8,374,549,021.71
  5. Step 5: Solve for x
    x = 8,374,549,021.71/100,600.78
  6. Step 6: Final answer
    x = 83,245.37

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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.