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Finding the Fourth Proportional to 100,066.55, 138,091.34 and 54,743.71

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Solution

The fourth proportional to 100,066.55, 138,091.34 and 54,743.71 is: 75,546.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,066.55 : 138,091.34 = 54,743.71 : x
  2. Step 2: Convert to fraction form
    100,066.55/138,091.34 = 54,743.71/x
  3. Step 3: Cross multiply
    100,066.55x = 138,091.34 × 54,743.71
  4. Step 4: Simplify right side
    100,066.55x = 7,559,632,009.63
  5. Step 5: Solve for x
    x = 7,559,632,009.63/100,066.55
  6. Step 6: Final answer
    x = 75,546.05

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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.