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Finding the Fourth Proportional to 129,859.60, 194,789.40 and 103,615.60

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Solution

The fourth proportional to 129,859.60, 194,789.40 and 103,615.60 is: 155,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,859.60 : 194,789.40 = 103,615.60 : x
  2. Step 2: Convert to fraction form
    129,859.60/194,789.40 = 103,615.60/x
  3. Step 3: Cross multiply
    129,859.60x = 194,789.40 × 103,615.60
  4. Step 4: Simplify right side
    129,859.60x = 20,183,220,554.64
  5. Step 5: Solve for x
    x = 20,183,220,554.64/129,859.60
  6. Step 6: Final answer
    x = 155,423.40

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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.