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Finding the Fourth Proportional to 100,620.42, 138,850.53 and 60,314.01

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Solution

The fourth proportional to 100,620.42, 138,850.53 and 60,314.01 is: 83,229.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,620.42 : 138,850.53 = 60,314.01 : x
  2. Step 2: Convert to fraction form
    100,620.42/138,850.53 = 60,314.01/x
  3. Step 3: Cross multiply
    100,620.42x = 138,850.53 × 60,314.01
  4. Step 4: Simplify right side
    100,620.42x = 8,374,632,254.93
  5. Step 5: Solve for x
    x = 8,374,632,254.93/100,620.42
  6. Step 6: Final answer
    x = 83,229.95

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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.