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Finding the Fourth Proportional to 70,992.78, 97,970.31 and 39,161.22

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Solution

The fourth proportional to 70,992.78, 97,970.31 and 39,161.22 is: 54,042.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,992.78 : 97,970.31 = 39,161.22 : x
  2. Step 2: Convert to fraction form
    70,992.78/97,970.31 = 39,161.22/x
  3. Step 3: Cross multiply
    70,992.78x = 97,970.31 × 39,161.22
  4. Step 4: Simplify right side
    70,992.78x = 3,836,636,863.38
  5. Step 5: Solve for x
    x = 3,836,636,863.38/70,992.78
  6. Step 6: Final answer
    x = 54,042.63

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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.