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Finding the Fourth Proportional to 260,688.51, 391,039.61 and 83,195.39

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Solution

The fourth proportional to 260,688.51, 391,039.61 and 83,195.39 is: 124,795.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,688.51 : 391,039.61 = 83,195.39 : x
  2. Step 2: Convert to fraction form
    260,688.51/391,039.61 = 83,195.39/x
  3. Step 3: Cross multiply
    260,688.51x = 391,039.61 × 83,195.39
  4. Step 4: Simplify right side
    260,688.51x = 32,532,692,859.40
  5. Step 5: Solve for x
    x = 32,532,692,859.40/260,688.51
  6. Step 6: Final answer
    x = 124,795.27

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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.