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Finding the Fourth Proportional to 261,151.62, 391,783.83 and 81,233.62

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Solution

The fourth proportional to 261,151.62, 391,783.83 and 81,233.62 is: 121,867.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,151.62 : 391,783.83 = 81,233.62 : x
  2. Step 2: Convert to fraction form
    261,151.62/391,783.83 = 81,233.62/x
  3. Step 3: Cross multiply
    261,151.62x = 391,783.83 × 81,233.62
  4. Step 4: Simplify right side
    261,151.62x = 31,826,018,768.36
  5. Step 5: Solve for x
    x = 31,826,018,768.36/261,151.62
  6. Step 6: Final answer
    x = 121,867.97

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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.