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Finding the Fourth Proportional to 100,675.96, 138,929.88 and 55,353.89

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Solution

The fourth proportional to 100,675.96, 138,929.88 and 55,353.89 is: 76,386.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,675.96 : 138,929.88 = 55,353.89 : x
  2. Step 2: Convert to fraction form
    100,675.96/138,929.88 = 55,353.89/x
  3. Step 3: Cross multiply
    100,675.96x = 138,929.88 × 55,353.89
  4. Step 4: Simplify right side
    100,675.96x = 7,690,309,850.14
  5. Step 5: Solve for x
    x = 7,690,309,850.14/100,675.96
  6. Step 6: Final answer
    x = 76,386.76

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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.