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Finding the Fourth Proportional to 70,404.60, 105,722.10 and 47,134.20

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Solution

The fourth proportional to 70,404.60, 105,722.10 and 47,134.20 is: 70,778.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,404.60 : 105,722.10 = 47,134.20 : x
  2. Step 2: Convert to fraction form
    70,404.60/105,722.10 = 47,134.20/x
  3. Step 3: Cross multiply
    70,404.60x = 105,722.10 × 47,134.20
  4. Step 4: Simplify right side
    70,404.60x = 4,983,126,605.82
  5. Step 5: Solve for x
    x = 4,983,126,605.82/70,404.60
  6. Step 6: Final answer
    x = 70,778.42

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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.