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Finding the Fourth Proportional to 79,312.80, 109,450 and 43,502.88

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Solution

The fourth proportional to 79,312.80, 109,450 and 43,502.88 is: 60,033.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,312.80 : 109,450 = 43,502.88 : x
  2. Step 2: Convert to fraction form
    79,312.80/109,450 = 43,502.88/x
  3. Step 3: Cross multiply
    79,312.80x = 109,450 × 43,502.88
  4. Step 4: Simplify right side
    79,312.80x = 4,761,390,216
  5. Step 5: Solve for x
    x = 4,761,390,216/79,312.80
  6. Step 6: Final answer
    x = 60,033.06

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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.