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Finding the Fourth Proportional to 391,701.60, 587,595.60 and 125,416.80

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Solution

The fourth proportional to 391,701.60, 587,595.60 and 125,416.80 is: 188,139.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,701.60 : 587,595.60 = 125,416.80 : x
  2. Step 2: Convert to fraction form
    391,701.60/587,595.60 = 125,416.80/x
  3. Step 3: Cross multiply
    391,701.60x = 587,595.60 × 125,416.80
  4. Step 4: Simplify right side
    391,701.60x = 73,694,359,846.08
  5. Step 5: Solve for x
    x = 73,694,359,846.08/391,701.60
  6. Step 6: Final answer
    x = 188,139.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.