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Finding the Fourth Proportional to 261,169.43, 391,743.18 and 83,672.51

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Solution

The fourth proportional to 261,169.43, 391,743.18 and 83,672.51 is: 125,505.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,169.43 : 391,743.18 = 83,672.51 : x
  2. Step 2: Convert to fraction form
    261,169.43/391,743.18 = 83,672.51/x
  3. Step 3: Cross multiply
    261,169.43x = 391,743.18 × 83,672.51
  4. Step 4: Simplify right side
    261,169.43x = 32,778,133,187.27
  5. Step 5: Solve for x
    x = 32,778,133,187.27/261,169.43
  6. Step 6: Final answer
    x = 125,505.25

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1.5x scale

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.