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Finding the Fourth Proportional to 100,670.22, 138,928.77 and 57,656.52

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Solution

The fourth proportional to 100,670.22, 138,928.77 and 57,656.52 is: 79,568.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.22 : 138,928.77 = 57,656.52 : x
  2. Step 2: Convert to fraction form
    100,670.22/138,928.77 = 57,656.52/x
  3. Step 3: Cross multiply
    100,670.22x = 138,928.77 × 57,656.52
  4. Step 4: Simplify right side
    100,670.22x = 8,010,149,406.08
  5. Step 5: Solve for x
    x = 8,010,149,406.08/100,670.22
  6. Step 6: Final answer
    x = 79,568.21

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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.