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Finding the Fourth Proportional to 100,118.66, 138,158.12 and 54,796.55

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Solution

The fourth proportional to 100,118.66, 138,158.12 and 54,796.55 is: 75,616.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,118.66 : 138,158.12 = 54,796.55 : x
  2. Step 2: Convert to fraction form
    100,118.66/138,158.12 = 54,796.55/x
  3. Step 3: Cross multiply
    100,118.66x = 138,158.12 × 54,796.55
  4. Step 4: Simplify right side
    100,118.66x = 7,570,587,776.69
  5. Step 5: Solve for x
    x = 7,570,587,776.69/100,118.66
  6. Step 6: Final answer
    x = 75,616.16

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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.