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Finding the Fourth Proportional to 83,910.72, 115,783.36 and 53,722.88

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Solution

The fourth proportional to 83,910.72, 115,783.36 and 53,722.88 is: 74,128.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,910.72 : 115,783.36 = 53,722.88 : x
  2. Step 2: Convert to fraction form
    83,910.72/115,783.36 = 53,722.88/x
  3. Step 3: Cross multiply
    83,910.72x = 115,783.36 × 53,722.88
  4. Step 4: Simplify right side
    83,910.72x = 6,220,215,555.28
  5. Step 5: Solve for x
    x = 6,220,215,555.28/83,910.72
  6. Step 6: Final answer
    x = 74,128.97

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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.