Home / 129,859.10-194,788.65-103,615.10

Finding the Fourth Proportional to 129,859.10, 194,788.65 and 103,615.10

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Solution

The fourth proportional to 129,859.10, 194,788.65 and 103,615.10 is: 155,422.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,859.10 : 194,788.65 = 103,615.10 : x
  2. Step 2: Convert to fraction form
    129,859.10/194,788.65 = 103,615.10/x
  3. Step 3: Cross multiply
    129,859.10x = 194,788.65 × 103,615.10
  4. Step 4: Simplify right side
    129,859.10x = 20,183,045,448.62
  5. Step 5: Solve for x
    x = 20,183,045,448.62/129,859.10
  6. Step 6: Final answer
    x = 155,422.65

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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.