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Finding the Fourth Proportional to 79,066.92, 109,178.83 and 56,475.21

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Solution

The fourth proportional to 79,066.92, 109,178.83 and 56,475.21 is: 77,983.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,066.92 : 109,178.83 = 56,475.21 : x
  2. Step 2: Convert to fraction form
    79,066.92/109,178.83 = 56,475.21/x
  3. Step 3: Cross multiply
    79,066.92x = 109,178.83 × 56,475.21
  4. Step 4: Simplify right side
    79,066.92x = 6,165,896,664.72
  5. Step 5: Solve for x
    x = 6,165,896,664.72/79,066.92
  6. Step 6: Final answer
    x = 77,983.27

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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.