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Finding the Fourth Proportional to 101,108.49, 139,529.30 and 55,789.29

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Solution

The fourth proportional to 101,108.49, 139,529.30 and 55,789.29 is: 76,988.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,108.49 : 139,529.30 = 55,789.29 : x
  2. Step 2: Convert to fraction form
    101,108.49/139,529.30 = 55,789.29/x
  3. Step 3: Cross multiply
    101,108.49x = 139,529.30 × 55,789.29
  4. Step 4: Simplify right side
    101,108.49x = 7,784,240,581.20
  5. Step 5: Solve for x
    x = 7,784,240,581.20/101,108.49
  6. Step 6: Final answer
    x = 76,988.99

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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.