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Finding the Fourth Proportional to 79,472.84, 109,623.87 and 47,185.55

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Solution

The fourth proportional to 79,472.84, 109,623.87 and 47,185.55 is: 65,087.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,472.84 : 109,623.87 = 47,185.55 : x
  2. Step 2: Convert to fraction form
    79,472.84/109,623.87 = 47,185.55/x
  3. Step 3: Cross multiply
    79,472.84x = 109,623.87 × 47,185.55
  4. Step 4: Simplify right side
    79,472.84x = 5,172,662,050.96
  5. Step 5: Solve for x
    x = 5,172,662,050.96/79,472.84
  6. Step 6: Final answer
    x = 65,087.17

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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.