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Finding the Fourth Proportional to 79,036.47, 109,020.47 and 55,154.43

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Solution

The fourth proportional to 79,036.47, 109,020.47 and 55,154.43 is: 76,078.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,036.47 : 109,020.47 = 55,154.43 : x
  2. Step 2: Convert to fraction form
    79,036.47/109,020.47 = 55,154.43/x
  3. Step 3: Cross multiply
    79,036.47x = 109,020.47 × 55,154.43
  4. Step 4: Simplify right side
    79,036.47x = 6,012,961,605.41
  5. Step 5: Solve for x
    x = 6,012,961,605.41/79,036.47
  6. Step 6: Final answer
    x = 76,078.32

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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.