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Finding the Fourth Proportional to 79,080, 109,129.38 and 43,269.48

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Solution

The fourth proportional to 79,080, 109,129.38 and 43,269.48 is: 59,711.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,080 : 109,129.38 = 43,269.48 : x
  2. Step 2: Convert to fraction form
    79,080/109,129.38 = 43,269.48/x
  3. Step 3: Cross multiply
    79,080x = 109,129.38 × 43,269.48
  4. Step 4: Simplify right side
    79,080x = 4,721,971,525.32
  5. Step 5: Solve for x
    x = 4,721,971,525.32/79,080
  6. Step 6: Final answer
    x = 59,711.32

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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.