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Finding the Fourth Proportional to 129,898.20, 194,750.10 and 70,800.60

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Solution

The fourth proportional to 129,898.20, 194,750.10 and 70,800.60 is: 106,147.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,898.20 : 194,750.10 = 70,800.60 : x
  2. Step 2: Convert to fraction form
    129,898.20/194,750.10 = 70,800.60/x
  3. Step 3: Cross multiply
    129,898.20x = 194,750.10 × 70,800.60
  4. Step 4: Simplify right side
    129,898.20x = 13,788,423,930.06
  5. Step 5: Solve for x
    x = 13,788,423,930.06/129,898.20
  6. Step 6: Final answer
    x = 106,147.92

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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.