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Finding the Fourth Proportional to 83,958.50, 115,825.25 and 56,725.80

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Solution

The fourth proportional to 83,958.50, 115,825.25 and 56,725.80 is: 78,256.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,958.50 : 115,825.25 = 56,725.80 : x
  2. Step 2: Convert to fraction form
    83,958.50/115,825.25 = 56,725.80/x
  3. Step 3: Cross multiply
    83,958.50x = 115,825.25 × 56,725.80
  4. Step 4: Simplify right side
    83,958.50x = 6,570,279,966.45
  5. Step 5: Solve for x
    x = 6,570,279,966.45/83,958.50
  6. Step 6: Final answer
    x = 78,256.28

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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.