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Finding the Fourth Proportional to 70,992.32, 97,961.82 and 39,161.21

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Solution

The fourth proportional to 70,992.32, 97,961.82 and 39,161.21 is: 54,038.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,992.32 : 97,961.82 = 39,161.21 : x
  2. Step 2: Convert to fraction form
    70,992.32/97,961.82 = 39,161.21/x
  3. Step 3: Cross multiply
    70,992.32x = 97,961.82 × 39,161.21
  4. Step 4: Simplify right side
    70,992.32x = 3,836,303,649.91
  5. Step 5: Solve for x
    x = 3,836,303,649.91/70,992.32
  6. Step 6: Final answer
    x = 54,038.29

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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.