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Finding the Fourth Proportional to 79,703.36, 109,957.62 and 47,431.52

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Solution

The fourth proportional to 79,703.36, 109,957.62 and 47,431.52 is: 65,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,703.36 : 109,957.62 = 47,431.52 : x
  2. Step 2: Convert to fraction form
    79,703.36/109,957.62 = 47,431.52/x
  3. Step 3: Cross multiply
    79,703.36x = 109,957.62 × 47,431.52
  4. Step 4: Simplify right side
    79,703.36x = 5,215,457,052.18
  5. Step 5: Solve for x
    x = 5,215,457,052.18/79,703.36
  6. Step 6: Final answer
    x = 65,435.85

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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.