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Finding the Fourth Proportional to 205,809.10, 308,713.65 and 100,833.10

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Solution

The fourth proportional to 205,809.10, 308,713.65 and 100,833.10 is: 151,249.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,809.10 : 308,713.65 = 100,833.10 : x
  2. Step 2: Convert to fraction form
    205,809.10/308,713.65 = 100,833.10/x
  3. Step 3: Cross multiply
    205,809.10x = 308,713.65 × 100,833.10
  4. Step 4: Simplify right side
    205,809.10x = 31,128,554,341.82
  5. Step 5: Solve for x
    x = 31,128,554,341.82/205,809.10
  6. Step 6: Final answer
    x = 151,249.65

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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.