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Finding the Fourth Proportional to 100,265.85, 138,364.68 and 54,942.84

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Solution

The fourth proportional to 100,265.85, 138,364.68 and 54,942.84 is: 75,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,265.85 : 138,364.68 = 54,942.84 : x
  2. Step 2: Convert to fraction form
    100,265.85/138,364.68 = 54,942.84/x
  3. Step 3: Cross multiply
    100,265.85x = 138,364.68 × 54,942.84
  4. Step 4: Simplify right side
    100,265.85x = 7,602,148,474.89
  5. Step 5: Solve for x
    x = 7,602,148,474.89/100,265.85
  6. Step 6: Final answer
    x = 75,819.92

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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.