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Finding the Fourth Proportional to 53,150.63, 79,735.74 and 21,988.31

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Solution

The fourth proportional to 53,150.63, 79,735.74 and 21,988.31 is: 32,986.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,150.63 : 79,735.74 = 21,988.31 : x
  2. Step 2: Convert to fraction form
    53,150.63/79,735.74 = 21,988.31/x
  3. Step 3: Cross multiply
    53,150.63x = 79,735.74 × 21,988.31
  4. Step 4: Simplify right side
    53,150.63x = 1,753,254,169.20
  5. Step 5: Solve for x
    x = 1,753,254,169.20/53,150.63
  6. Step 6: Final answer
    x = 32,986.52

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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.