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Finding the Fourth Proportional to 210,327.70, 315,819.60 and 121,754.20

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Solution

The fourth proportional to 210,327.70, 315,819.60 and 121,754.20 is: 182,821.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,327.70 : 315,819.60 = 121,754.20 : x
  2. Step 2: Convert to fraction form
    210,327.70/315,819.60 = 121,754.20/x
  3. Step 3: Cross multiply
    210,327.70x = 315,819.60 × 121,754.20
  4. Step 4: Simplify right side
    210,327.70x = 38,452,362,742.32
  5. Step 5: Solve for x
    x = 38,452,362,742.32/210,327.70
  6. Step 6: Final answer
    x = 182,821.20

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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.