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Finding the Fourth Proportional to 100,331.68, 138,344.16 and 63,984.48

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Solution

The fourth proportional to 100,331.68, 138,344.16 and 63,984.48 is: 88,226.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,331.68 : 138,344.16 = 63,984.48 : x
  2. Step 2: Convert to fraction form
    100,331.68/138,344.16 = 63,984.48/x
  3. Step 3: Cross multiply
    100,331.68x = 138,344.16 × 63,984.48
  4. Step 4: Simplify right side
    100,331.68x = 8,851,879,138.64
  5. Step 5: Solve for x
    x = 8,851,879,138.64/100,331.68
  6. Step 6: Final answer
    x = 88,226.16

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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.