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Finding the Fourth Proportional to 203,668.78, 305,430.27 and 70,513.29

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Solution

The fourth proportional to 203,668.78, 305,430.27 and 70,513.29 is: 105,744.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,668.78 : 305,430.27 = 70,513.29 : x
  2. Step 2: Convert to fraction form
    203,668.78/305,430.27 = 70,513.29/x
  3. Step 3: Cross multiply
    203,668.78x = 305,430.27 × 70,513.29
  4. Step 4: Simplify right side
    203,668.78x = 21,536,893,203.29
  5. Step 5: Solve for x
    x = 21,536,893,203.29/203,668.78
  6. Step 6: Final answer
    x = 105,744.70

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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.