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Finding the Fourth Proportional to 79,139.48, 109,215.08 and 43,329.48

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Solution

The fourth proportional to 79,139.48, 109,215.08 and 43,329.48 is: 59,796.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,139.48 : 109,215.08 = 43,329.48 : x
  2. Step 2: Convert to fraction form
    79,139.48/109,215.08 = 43,329.48/x
  3. Step 3: Cross multiply
    79,139.48x = 109,215.08 × 43,329.48
  4. Step 4: Simplify right side
    79,139.48x = 4,732,232,624.56
  5. Step 5: Solve for x
    x = 4,732,232,624.56/79,139.48
  6. Step 6: Final answer
    x = 59,796.10

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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.