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Finding the Fourth Proportional to 194,819.20, 292,228.80 and 70,115.20

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Solution

The fourth proportional to 194,819.20, 292,228.80 and 70,115.20 is: 105,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,819.20 : 292,228.80 = 70,115.20 : x
  2. Step 2: Convert to fraction form
    194,819.20/292,228.80 = 70,115.20/x
  3. Step 3: Cross multiply
    194,819.20x = 292,228.80 × 70,115.20
  4. Step 4: Simplify right side
    194,819.20x = 20,489,680,757.76
  5. Step 5: Solve for x
    x = 20,489,680,757.76/194,819.20
  6. Step 6: Final answer
    x = 105,172.80

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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.