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Finding the Fourth Proportional to 100,676.64, 150,686.28 and 74,015.59

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Solution

The fourth proportional to 100,676.64, 150,686.28 and 74,015.59 is: 110,781.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,676.64 : 150,686.28 = 74,015.59 : x
  2. Step 2: Convert to fraction form
    100,676.64/150,686.28 = 74,015.59/x
  3. Step 3: Cross multiply
    100,676.64x = 150,686.28 × 74,015.59
  4. Step 4: Simplify right side
    100,676.64x = 11,153,133,919.11
  5. Step 5: Solve for x
    x = 11,153,133,919.11/100,676.64
  6. Step 6: Final answer
    x = 110,781.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.