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Finding the Fourth Proportional to 98,105.79, 135,381.99 and 55,663.41

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Solution

The fourth proportional to 98,105.79, 135,381.99 and 55,663.41 is: 76,813.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,105.79 : 135,381.99 = 55,663.41 : x
  2. Step 2: Convert to fraction form
    98,105.79/135,381.99 = 55,663.41/x
  3. Step 3: Cross multiply
    98,105.79x = 135,381.99 × 55,663.41
  4. Step 4: Simplify right side
    98,105.79x = 7,535,823,215.99
  5. Step 5: Solve for x
    x = 7,535,823,215.99/98,105.79
  6. Step 6: Final answer
    x = 76,813.24

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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.