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Finding the Fourth Proportional to 203,663.78, 305,516.47 and 70,543.79

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Solution

The fourth proportional to 203,663.78, 305,516.47 and 70,543.79 is: 105,822.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,663.78 : 305,516.47 = 70,543.79 : x
  2. Step 2: Convert to fraction form
    203,663.78/305,516.47 = 70,543.79/x
  3. Step 3: Cross multiply
    203,663.78x = 305,516.47 × 70,543.79
  4. Step 4: Simplify right side
    203,663.78x = 21,552,289,701.22
  5. Step 5: Solve for x
    x = 21,552,289,701.22/203,663.78
  6. Step 6: Final answer
    x = 105,822.89

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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.