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Finding the Fourth Proportional to 79,345, 109,496.10 and 45,811

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Solution

The fourth proportional to 79,345, 109,496.10 and 45,811 is: 63,219.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,345 : 109,496.10 = 45,811 : x
  2. Step 2: Convert to fraction form
    79,345/109,496.10 = 45,811/x
  3. Step 3: Cross multiply
    79,345x = 109,496.10 × 45,811
  4. Step 4: Simplify right side
    79,345x = 5,016,125,837.10
  5. Step 5: Solve for x
    x = 5,016,125,837.10/79,345
  6. Step 6: Final answer
    x = 63,219.18

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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.