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Finding the Fourth Proportional to 103,315.65, 154,809.45 and 68,214.30

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Solution

The fourth proportional to 103,315.65, 154,809.45 and 68,214.30 is: 102,213.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,315.65 : 154,809.45 = 68,214.30 : x
  2. Step 2: Convert to fraction form
    103,315.65/154,809.45 = 68,214.30/x
  3. Step 3: Cross multiply
    103,315.65x = 154,809.45 × 68,214.30
  4. Step 4: Simplify right side
    103,315.65x = 10,560,218,265.14
  5. Step 5: Solve for x
    x = 10,560,218,265.14/103,315.65
  6. Step 6: Final answer
    x = 102,213.15

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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.