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Finding the Fourth Proportional to 129,859.10, 194,460.60 and 103,615.10

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Solution

The fourth proportional to 129,859.10, 194,460.60 and 103,615.10 is: 155,160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,859.10 : 194,460.60 = 103,615.10 : x
  2. Step 2: Convert to fraction form
    129,859.10/194,460.60 = 103,615.10/x
  3. Step 3: Cross multiply
    129,859.10x = 194,460.60 × 103,615.10
  4. Step 4: Simplify right side
    129,859.10x = 20,149,054,515.06
  5. Step 5: Solve for x
    x = 20,149,054,515.06/129,859.10
  6. Step 6: Final answer
    x = 155,160.90

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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.