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Finding the Fourth Proportional to 210,771.60, 315,501.30 and 121,760.70

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Solution

The fourth proportional to 210,771.60, 315,501.30 and 121,760.70 is: 182,262.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,771.60 : 315,501.30 = 121,760.70 : x
  2. Step 2: Convert to fraction form
    210,771.60/315,501.30 = 121,760.70/x
  3. Step 3: Cross multiply
    210,771.60x = 315,501.30 × 121,760.70
  4. Step 4: Simplify right side
    210,771.60x = 38,415,659,138.91
  5. Step 5: Solve for x
    x = 38,415,659,138.91/210,771.60
  6. Step 6: Final answer
    x = 182,262.03

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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.