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Finding the Fourth Proportional to 83,676.97, 115,445.70 and 53,479.72

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Solution

The fourth proportional to 83,676.97, 115,445.70 and 53,479.72 is: 73,783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,676.97 : 115,445.70 = 53,479.72 : x
  2. Step 2: Convert to fraction form
    83,676.97/115,445.70 = 53,479.72/x
  3. Step 3: Cross multiply
    83,676.97x = 115,445.70 × 53,479.72
  4. Step 4: Simplify right side
    83,676.97x = 6,174,003,711.20
  5. Step 5: Solve for x
    x = 6,174,003,711.20/83,676.97
  6. Step 6: Final answer
    x = 73,783.79

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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.