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Finding the Fourth Proportional to 100,408.01, 138,572.01 and 55,094.81

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Solution

The fourth proportional to 100,408.01, 138,572.01 and 55,094.81 is: 76,035.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,408.01 : 138,572.01 = 55,094.81 : x
  2. Step 2: Convert to fraction form
    100,408.01/138,572.01 = 55,094.81/x
  3. Step 3: Cross multiply
    100,408.01x = 138,572.01 × 55,094.81
  4. Step 4: Simplify right side
    100,408.01x = 7,634,598,562.27
  5. Step 5: Solve for x
    x = 7,634,598,562.27/100,408.01
  6. Step 6: Final answer
    x = 76,035.76

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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.