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Finding the Fourth Proportional to 100,591, 138,800.12 and 58,141.32

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Solution

The fourth proportional to 100,591, 138,800.12 and 58,141.32 is: 80,226.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,591 : 138,800.12 = 58,141.32 : x
  2. Step 2: Convert to fraction form
    100,591/138,800.12 = 58,141.32/x
  3. Step 3: Cross multiply
    100,591x = 138,800.12 × 58,141.32
  4. Step 4: Simplify right side
    100,591x = 8,070,022,192.96
  5. Step 5: Solve for x
    x = 8,070,022,192.96/100,591
  6. Step 6: Final answer
    x = 80,226.09

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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.