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Finding the Fourth Proportional to 70,908.21, 97,854 and 39,078.27

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Solution

The fourth proportional to 70,908.21, 97,854 and 39,078.27 is: 53,928.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,908.21 : 97,854 = 39,078.27 : x
  2. Step 2: Convert to fraction form
    70,908.21/97,854 = 39,078.27/x
  3. Step 3: Cross multiply
    70,908.21x = 97,854 × 39,078.27
  4. Step 4: Simplify right side
    70,908.21x = 3,823,965,032.58
  5. Step 5: Solve for x
    x = 3,823,965,032.58/70,908.21
  6. Step 6: Final answer
    x = 53,928.38

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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.