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Finding the Fourth Proportional to 71,968.40, 107,952.60 and 25,215.20

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Solution

The fourth proportional to 71,968.40, 107,952.60 and 25,215.20 is: 37,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,968.40 : 107,952.60 = 25,215.20 : x
  2. Step 2: Convert to fraction form
    71,968.40/107,952.60 = 25,215.20/x
  3. Step 3: Cross multiply
    71,968.40x = 107,952.60 × 25,215.20
  4. Step 4: Simplify right side
    71,968.40x = 2,722,046,399.52
  5. Step 5: Solve for x
    x = 2,722,046,399.52/71,968.40
  6. Step 6: Final answer
    x = 37,822.80

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1.5x scale

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.