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Finding the Fourth Proportional to 79,130.56, 109,200 and 47,297.92

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Solution

The fourth proportional to 79,130.56, 109,200 and 47,297.92 is: 65,271.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,130.56 : 109,200 = 47,297.92 : x
  2. Step 2: Convert to fraction form
    79,130.56/109,200 = 47,297.92/x
  3. Step 3: Cross multiply
    79,130.56x = 109,200 × 47,297.92
  4. Step 4: Simplify right side
    79,130.56x = 5,164,932,864
  5. Step 5: Solve for x
    x = 5,164,932,864/79,130.56
  6. Step 6: Final answer
    x = 65,271.03

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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.