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Finding the Fourth Proportional to 100,608.03, 138,899.97 and 66,645.45

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Solution

The fourth proportional to 100,608.03, 138,899.97 and 66,645.45 is: 92,011.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.03 : 138,899.97 = 66,645.45 : x
  2. Step 2: Convert to fraction form
    100,608.03/138,899.97 = 66,645.45/x
  3. Step 3: Cross multiply
    100,608.03x = 138,899.97 × 66,645.45
  4. Step 4: Simplify right side
    100,608.03x = 9,257,051,005.64
  5. Step 5: Solve for x
    x = 9,257,051,005.64/100,608.03
  6. Step 6: Final answer
    x = 92,011.06

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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.