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Finding the Fourth Proportional to 100,764.63, 139,074.44 and 66,713.04

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Solution

The fourth proportional to 100,764.63, 139,074.44 and 66,713.04 is: 92,076.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,764.63 : 139,074.44 = 66,713.04 : x
  2. Step 2: Convert to fraction form
    100,764.63/139,074.44 = 66,713.04/x
  3. Step 3: Cross multiply
    100,764.63x = 139,074.44 × 66,713.04
  4. Step 4: Simplify right side
    100,764.63x = 9,278,078,345.13
  5. Step 5: Solve for x
    x = 9,278,078,345.13/100,764.63
  6. Step 6: Final answer
    x = 92,076.74

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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.