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Finding the Fourth Proportional to 203,407.20, 305,110.80 and 55,663.20

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Solution

The fourth proportional to 203,407.20, 305,110.80 and 55,663.20 is: 83,494.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,407.20 : 305,110.80 = 55,663.20 : x
  2. Step 2: Convert to fraction form
    203,407.20/305,110.80 = 55,663.20/x
  3. Step 3: Cross multiply
    203,407.20x = 305,110.80 × 55,663.20
  4. Step 4: Simplify right side
    203,407.20x = 16,983,443,482.56
  5. Step 5: Solve for x
    x = 16,983,443,482.56/203,407.20
  6. Step 6: Final answer
    x = 83,494.80

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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.