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Finding the Fourth Proportional to 53,081.90, 79,610.04 and 15,631.80

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Solution

The fourth proportional to 53,081.90, 79,610.04 and 15,631.80 is: 23,443.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,081.90 : 79,610.04 = 15,631.80 : x
  2. Step 2: Convert to fraction form
    53,081.90/79,610.04 = 15,631.80/x
  3. Step 3: Cross multiply
    53,081.90x = 79,610.04 × 15,631.80
  4. Step 4: Simplify right side
    53,081.90x = 1,244,448,223.27
  5. Step 5: Solve for x
    x = 1,244,448,223.27/53,081.90
  6. Step 6: Final answer
    x = 23,443.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.