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Finding the Fourth Proportional to 70,909.62, 97,853.36 and 39,078.51

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Solution

The fourth proportional to 70,909.62, 97,853.36 and 39,078.51 is: 53,927.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.62 : 97,853.36 = 39,078.51 : x
  2. Step 2: Convert to fraction form
    70,909.62/97,853.36 = 39,078.51/x
  3. Step 3: Cross multiply
    70,909.62x = 97,853.36 × 39,078.51
  4. Step 4: Simplify right side
    70,909.62x = 3,823,963,311.90
  5. Step 5: Solve for x
    x = 3,823,963,311.90/70,909.62
  6. Step 6: Final answer
    x = 53,927.29

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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.