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Finding the Fourth Proportional to 260,717.60, 391,076.40 and 83,237.60

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Solution

The fourth proportional to 260,717.60, 391,076.40 and 83,237.60 is: 124,856.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,717.60 : 391,076.40 = 83,237.60 : x
  2. Step 2: Convert to fraction form
    260,717.60/391,076.40 = 83,237.60/x
  3. Step 3: Cross multiply
    260,717.60x = 391,076.40 × 83,237.60
  4. Step 4: Simplify right side
    260,717.60x = 32,552,260,952.64
  5. Step 5: Solve for x
    x = 32,552,260,952.64/260,717.60
  6. Step 6: Final answer
    x = 124,856.40

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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.