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Finding the Fourth Proportional to 100,608.12, 138,828.60 and 58,180.32

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Solution

The fourth proportional to 100,608.12, 138,828.60 and 58,180.32 is: 80,282.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.12 : 138,828.60 = 58,180.32 : x
  2. Step 2: Convert to fraction form
    100,608.12/138,828.60 = 58,180.32/x
  3. Step 3: Cross multiply
    100,608.12x = 138,828.60 × 58,180.32
  4. Step 4: Simplify right side
    100,608.12x = 8,077,092,373.15
  5. Step 5: Solve for x
    x = 8,077,092,373.15/100,608.12
  6. Step 6: Final answer
    x = 80,282.71

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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.