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Finding the Fourth Proportional to 79,603.72, 109,898.64 and 52,782.68

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Solution

The fourth proportional to 79,603.72, 109,898.64 and 52,782.68 is: 72,870.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,603.72 : 109,898.64 = 52,782.68 : x
  2. Step 2: Convert to fraction form
    79,603.72/109,898.64 = 52,782.68/x
  3. Step 3: Cross multiply
    79,603.72x = 109,898.64 × 52,782.68
  4. Step 4: Simplify right side
    79,603.72x = 5,800,744,747.56
  5. Step 5: Solve for x
    x = 5,800,744,747.56/79,603.72
  6. Step 6: Final answer
    x = 72,870.27

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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.