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Finding the Fourth Proportional to 79,720.64, 109,949.04 and 58,186.16

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Solution

The fourth proportional to 79,720.64, 109,949.04 and 58,186.16 is: 80,249.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,720.64 : 109,949.04 = 58,186.16 : x
  2. Step 2: Convert to fraction form
    79,720.64/109,949.04 = 58,186.16/x
  3. Step 3: Cross multiply
    79,720.64x = 109,949.04 × 58,186.16
  4. Step 4: Simplify right side
    79,720.64x = 6,397,512,433.29
  5. Step 5: Solve for x
    x = 6,397,512,433.29/79,720.64
  6. Step 6: Final answer
    x = 80,249.14

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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.