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Finding the Fourth Proportional to 100,375.44, 138,562.55 and 70,279.08

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Solution

The fourth proportional to 100,375.44, 138,562.55 and 70,279.08 is: 97,016.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,375.44 : 138,562.55 = 70,279.08 : x
  2. Step 2: Convert to fraction form
    100,375.44/138,562.55 = 70,279.08/x
  3. Step 3: Cross multiply
    100,375.44x = 138,562.55 × 70,279.08
  4. Step 4: Simplify right side
    100,375.44x = 9,738,048,536.45
  5. Step 5: Solve for x
    x = 9,738,048,536.45/100,375.44
  6. Step 6: Final answer
    x = 97,016.25

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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.