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Finding the Fourth Proportional to 70,911.78, 97,854.51 and 39,074.70

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Solution

The fourth proportional to 70,911.78, 97,854.51 and 39,074.70 is: 53,921.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,911.78 : 97,854.51 = 39,074.70 : x
  2. Step 2: Convert to fraction form
    70,911.78/97,854.51 = 39,074.70/x
  3. Step 3: Cross multiply
    70,911.78x = 97,854.51 × 39,074.70
  4. Step 4: Simplify right side
    70,911.78x = 3,823,635,621.90
  5. Step 5: Solve for x
    x = 3,823,635,621.90/70,911.78
  6. Step 6: Final answer
    x = 53,921.02

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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.