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Finding the Fourth Proportional to 70,279.21, 96,986.87 and 38,448.10

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Solution

The fourth proportional to 70,279.21, 96,986.87 and 38,448.10 is: 53,059.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,279.21 : 96,986.87 = 38,448.10 : x
  2. Step 2: Convert to fraction form
    70,279.21/96,986.87 = 38,448.10/x
  3. Step 3: Cross multiply
    70,279.21x = 96,986.87 × 38,448.10
  4. Step 4: Simplify right side
    70,279.21x = 3,728,960,876.45
  5. Step 5: Solve for x
    x = 3,728,960,876.45/70,279.21
  6. Step 6: Final answer
    x = 53,059.23

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1.5x scale

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.