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Finding the Fourth Proportional to 79,703.19, 109,957.39 and 47,431.37

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Solution

The fourth proportional to 79,703.19, 109,957.39 and 47,431.37 is: 65,435.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,703.19 : 109,957.39 = 47,431.37 : x
  2. Step 2: Convert to fraction form
    79,703.19/109,957.39 = 47,431.37/x
  3. Step 3: Cross multiply
    79,703.19x = 109,957.39 × 47,431.37
  4. Step 4: Simplify right side
    79,703.19x = 5,215,429,805.64
  5. Step 5: Solve for x
    x = 5,215,429,805.64/79,703.19
  6. Step 6: Final answer
    x = 65,435.65

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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.