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Finding the Fourth Proportional to 100,171.56, 138,247.79 and 63,874.34

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Solution

The fourth proportional to 100,171.56, 138,247.79 and 63,874.34 is: 88,153.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,171.56 : 138,247.79 = 63,874.34 : x
  2. Step 2: Convert to fraction form
    100,171.56/138,247.79 = 63,874.34/x
  3. Step 3: Cross multiply
    100,171.56x = 138,247.79 × 63,874.34
  4. Step 4: Simplify right side
    100,171.56x = 8,830,486,342.71
  5. Step 5: Solve for x
    x = 8,830,486,342.71/100,171.56
  6. Step 6: Final answer
    x = 88,153.63

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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.