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Finding the Fourth Proportional to 79,022.80, 109,039.20 and 45,026.96

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Solution

The fourth proportional to 79,022.80, 109,039.20 and 45,026.96 is: 62,130.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,022.80 : 109,039.20 = 45,026.96 : x
  2. Step 2: Convert to fraction form
    79,022.80/109,039.20 = 45,026.96/x
  3. Step 3: Cross multiply
    79,022.80x = 109,039.20 × 45,026.96
  4. Step 4: Simplify right side
    79,022.80x = 4,909,703,696.83
  5. Step 5: Solve for x
    x = 4,909,703,696.83/79,022.80
  6. Step 6: Final answer
    x = 62,130.22

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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.