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Finding the Fourth Proportional to 68,809.50, 103,231.59 and 19,561.50

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Solution

The fourth proportional to 68,809.50, 103,231.59 and 19,561.50 is: 29,347.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809.50 : 103,231.59 = 19,561.50 : x
  2. Step 2: Convert to fraction form
    68,809.50/103,231.59 = 19,561.50/x
  3. Step 3: Cross multiply
    68,809.50x = 103,231.59 × 19,561.50
  4. Step 4: Simplify right side
    68,809.50x = 2,019,364,747.79
  5. Step 5: Solve for x
    x = 2,019,364,747.79/68,809.50
  6. Step 6: Final answer
    x = 29,347.18

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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.