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Finding the Fourth Proportional to 79,745.32, 109,920.26 and 53,895.78

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Solution

The fourth proportional to 79,745.32, 109,920.26 and 53,895.78 is: 74,289.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,745.32 : 109,920.26 = 53,895.78 : x
  2. Step 2: Convert to fraction form
    79,745.32/109,920.26 = 53,895.78/x
  3. Step 3: Cross multiply
    79,745.32x = 109,920.26 × 53,895.78
  4. Step 4: Simplify right side
    79,745.32x = 5,924,238,150.50
  5. Step 5: Solve for x
    x = 5,924,238,150.50/79,745.32
  6. Step 6: Final answer
    x = 74,289.48

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1.5x scale

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.