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Finding the Fourth Proportional to 102,843.70, 154,265.55 and 90,013.30

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Solution

The fourth proportional to 102,843.70, 154,265.55 and 90,013.30 is: 135,019.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,843.70 : 154,265.55 = 90,013.30 : x
  2. Step 2: Convert to fraction form
    102,843.70/154,265.55 = 90,013.30/x
  3. Step 3: Cross multiply
    102,843.70x = 154,265.55 × 90,013.30
  4. Step 4: Simplify right side
    102,843.70x = 13,885,951,231.82
  5. Step 5: Solve for x
    x = 13,885,951,231.82/102,843.70
  6. Step 6: Final answer
    x = 135,019.95

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1.5x scale

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.