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Finding the Fourth Proportional to 70,911.36, 97,853.28 and 39,078.48

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Solution

The fourth proportional to 70,911.36, 97,853.28 and 39,078.48 is: 53,925.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,911.36 : 97,853.28 = 39,078.48 : x
  2. Step 2: Convert to fraction form
    70,911.36/97,853.28 = 39,078.48/x
  3. Step 3: Cross multiply
    70,911.36x = 97,853.28 × 39,078.48
  4. Step 4: Simplify right side
    70,911.36x = 3,823,957,445.41
  5. Step 5: Solve for x
    x = 3,823,957,445.41/70,911.36
  6. Step 6: Final answer
    x = 53,925.88

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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.