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Finding the Fourth Proportional to 70,398.28, 97,137.30 and 40,169.80

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Solution

The fourth proportional to 70,398.28, 97,137.30 and 40,169.80 is: 55,427.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,398.28 : 97,137.30 = 40,169.80 : x
  2. Step 2: Convert to fraction form
    70,398.28/97,137.30 = 40,169.80/x
  3. Step 3: Cross multiply
    70,398.28x = 97,137.30 × 40,169.80
  4. Step 4: Simplify right side
    70,398.28x = 3,901,985,913.54
  5. Step 5: Solve for x
    x = 3,901,985,913.54/70,398.28
  6. Step 6: Final answer
    x = 55,427.29

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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.