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Finding the Fourth Proportional to 79,315.78, 109,458.84 and 43,507.30

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Solution

The fourth proportional to 79,315.78, 109,458.84 and 43,507.30 is: 60,041.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,315.78 : 109,458.84 = 43,507.30 : x
  2. Step 2: Convert to fraction form
    79,315.78/109,458.84 = 43,507.30/x
  3. Step 3: Cross multiply
    79,315.78x = 109,458.84 × 43,507.30
  4. Step 4: Simplify right side
    79,315.78x = 4,762,258,589.53
  5. Step 5: Solve for x
    x = 4,762,258,589.53/79,315.78
  6. Step 6: Final answer
    x = 60,041.75

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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.